#competition-math

1 messages ยท Page 43 of 1

ornate blade
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but improving that score will take a lot of work

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the good news is that AMC10 shares around half its questions with AMC12

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no worries!

scenic kestrel
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so hopefully i can get someting good next year

ornate blade
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the Luke Robitaille one is clearly not the best video

scenic kestrel
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luke seems like a guy that uses intuition to solve most things

soft vigil
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15 on amc8 is like <=10 on amc10

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25 on amc8 is like 15-20 on amc10

ornate blade
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stayed at their current level forever

soft vigil
ornate blade
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fair

soft vigil
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oh wait they meant 15/25 as score

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lmao

ornate blade
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I mean there's different ways of responding to that, sure

soft vigil
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i mean realistically

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every amc score is different depending on the test

ornate blade
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this is my estimate of what can be done with only AMC8 knowledge

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yeah and of course each test varies

scenic kestrel
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i took the 2016 one for reference (average score was ~9/25

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wait

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i messe up

soft vigil
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what does ts mean

scenic kestrel
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nvmi didint

soft vigil
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your avg score?

ornate blade
scenic kestrel
scenic kestrel
soft vigil
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national avg means nothin

scenic kestrel
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oh really

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nvm then

ornate blade
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yeah the national average is usually pretty low

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a lot of people take it 'for fun', which is great for promoting maths of course

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or their maths skills aren't that great to begin with

scenic kestrel
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i was kind of close to making mathcounts national but there were two brothers who were a lil too good

ornate blade
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wow

scenic kestrel
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so i always thought ppl took math competitin seriously

soft vigil
soft vigil
scenic kestrel
ornate blade
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only a subset of people would actively be trying to qualify for AIME and so on though

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kids these days have too much stress on their plates

soft vigil
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i know a guy who was on the team

ornate blade
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dox

scenic kestrel
ornate blade
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omg the environment there would be

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they're on the US News list

soft vigil
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the last year i took mathcounts arizona did surprisingly good

scenic kestrel
soft vigil
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who

scenic kestrel
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bowen and ian

soft vigil
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idk these ppl

scenic kestrel
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the older one is taking calc bc in like 9th grade or sm

soft vigil
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idk if hes in hs now

scenic kestrel
soft vigil
ornate blade
soft vigil
ornate blade
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ah

soft vigil
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IL is like tier 2

long garden
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ban

surreal willow
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Wait what are basis schools guys?

ornate blade
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ah, they don't focus on STEM actually

misty otter
ivory pilot
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i an

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am

surreal willow
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Ado best frfr

surreal willow
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Why they stem school if they donโ€™t focus on stem ;-;

ornate blade
surreal willow
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Oh aight lol

misty otter
surreal willow
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No

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XD

soft vigil
misty otter
fluid lance
#

Is anyone here preparing for the AIME? DM me, I have some study materials.

grizzled jetty
fluid lance
fluid lance
latent dragon
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AMC 10/12 official results historically are released in December

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However the results have yet t be released

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so idk

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there is some discussion on 10B cutoffs being lower than 90 but not sure

surreal willow
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prob gonna be like 96

long garden
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im thinking maybe 91.5-93 ish actually

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the first few questions were kind of hell

shy geyser
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we do?

stable pewter
shy geyser
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who said that ๐Ÿ˜ญ

stable pewter
stable pewter
glacial quarry
glacial quarry
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3 I sillied 5 I didnโ€™t get

long garden
soft vigil
long garden
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๐Ÿ’”

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like ppl focused on the first 15 ish questions

tulip sand
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they misordered the questions sm this yr

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is aime prestige going down?

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idk y but i heard that somewhere

soft vigil
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aime has no prestige ๐Ÿฅ€

long garden
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i feel like thats kind of true esp with the scandals going on

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even oly is somewhat off putting

wraith tartan
timber citrus
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anyone in tmsca

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@everyone

soft vigil
iron terrace
unkempt quest
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not even the whole thing

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literally just like one question in first ten ๐Ÿ’€

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so for the b, i started on q25 and worked backwards

long garden
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aime looks good if its not your main gig i guess

long garden
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q9?

unkempt quest
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u mean for uni?

unkempt quest
long garden
unkempt quest
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q5 my dumbass counted wrong and thought the answer was 44

long garden
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ohh issok

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its just one question though

unkempt quest
long garden
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from there

unkempt quest
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but theres a bunch of cheaters

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on amc

long garden
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yeah true

unkempt quest
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more cheaters on amc than aime

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fs

long garden
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which is why its kind of not like that good if you make aime

unkempt quest
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eah

long garden
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bc like unis cant rlly trust ppl

unkempt quest
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or at least these last couple yrs

unkempt quest
long garden
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if you can oly qual thats better but still kind of doubtful

unkempt quest
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honestly, they can't trust olympiad results until amo/jmo

long garden
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i think i guess if you can get like at least hm theyll trust you

unkempt quest
long garden
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i mean even if you do worse than that

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๐Ÿ˜ญ

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its still like okay

unkempt quest
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like whats the point in grinidng if u can't get to national team level bcuz ppl still gonna doubt

long garden
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its just like i guess a lot harder to look good

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but usaco is lwk worse

stuck tartan
soft vigil
long garden
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i dont think it was usaco though

soft vigil
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a bunch of ppl from outside the US cheating

unkempt quest
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no bro canada's co was so bad they canceled results for everyone

scenic kestrel
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how do they prevent cheating on the amc tests, like if a teacher is in on it

unkempt quest
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lmao they can't

scenic kestrel
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but how

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wait nbm

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i read what u said wrong

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cuz i remember seeing ppl selling answers on reddit lmfao

unkempt quest
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its crazy bro

scenic kestrel
long garden
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i guess it looks better for the school if the people do better but thats literally wild

unkempt quest
opal hill
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Hello everyone! I don't know if this is the right "chat" to send this or not (if not, kindly tell me where). But I am in 8th grade and I am passionate about mathematics (and coding ๐Ÿ™‚
and want to participate in the Mathematical Olympiad. I gave the IOQM this year from KVS and got 24 (lost selection by 1 mark) without any preparation. I want to get to the RMO or INMO next year and I am planning to start this year. I can't afford those expensive tuitions and I'll have to self study. I can't find good videos about it on YouTube so I've turned to Discord. If you have any tips / help / guidance, it's welcomed.

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I have the PDFs for the following books, and I'll buy hardcopies of some (kindly tell me which ones).
An Excursion In Mathematics

  1. Challenges and Thrills of Pre-College Mathematics
  2. Mathematics Circles (Russian Experience)
  3. Functional Equations
  4. Problem Primer for the Olympiad
  5. Everything You Need to Ace Mathematics on One Big Fat Notebook
  6. Inequalities: An Approach Through Problems
opal hill
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?

opal hill
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?

sharp igloo
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sorry i dont know any of these i'm not english

reef condor
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Or that + volume 1

opal hill
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Many of my peers are recommending A_Beautiful_Journey_Through_Olympiad_Geometry, Modern_Olympiad_Number_Theory, and Principles-And-Techniques-In-Combinatronics too. What about these?

craggy isle
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How to do this calculation quickly manually?

20251126_220119.jpg
stable pewter
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I'd personally recommend volume 2

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And maybe a specific book for an area you struggle with

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For ex you struggle with geo get intro to geo

sleek ravine
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I just hallucinate a mustache

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๐Ÿ˜ญ

stable pewter
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i dont think whitebeard has black hair bro ๐Ÿฅ€

sleek ravine
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nah its his cap

stable pewter
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oh right

sleek ravine
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and the red part is his neck thing

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๐Ÿ˜ญ

stable pewter
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thats fair

subtle sundial
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ud lose out on some values by doing so

reef condor
craggy eagle
scenic cape
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I got 76.5 on amc 12 a

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i got 1.5 for q25 will i get the additional 4.5?

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also would this be enough for the cutoff?

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24 was so ez im so stupid for getting it wrong

pallid tundra
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if i had to guess the cutoffs for A are gonna be inflated bc of 25

stuck tartan
surreal blaze
vernal axle
# surreal blaze

A typical continued fraction 1/(1+1/(1+...+1/(1+x)) with Fibonacci numbers as numerators and denominators.

lethal wigeon
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Does anyone here know about the German math Olympiad, organized by the people who do this international stem Olympiad , the exams are tomorrow and I need someone to crash course me

Screenshot_20251128-171843.jpg
clear latch
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guys what can i use (online) to study for the imo?

surreal willow
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There are stuff on number theory, geo, and combinatorics that are all free online

clear scaffold
stable pewter
clear scaffold
empty merlin
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Is there any books or online pdf that I could use to study for AMC 10

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I need this

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My mom is kinda homeless

stable pewter
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id say the latter is better for the many exercises it has

empty merlin
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Spoil ratio mastering amc 10/12 ?

stable pewter
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? ๐Ÿ˜ญ ๐Ÿ˜ญ

empty merlin
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Sohil rathi

stable pewter
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oj

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oh

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yea

empty merlin
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What is the latter

empty merlin
long garden
long garden
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admits

craggy isle
frank valve
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if you're a billionaire

stuck tartan
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they have financial aid vro ๐Ÿ’”

unkempt quest
sullen zenith
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Help!

scarlet rootBOT
# sullen zenith 
What step are you on?
1. I don't know where to begin.
2. I have begun but got stuck midway.
3. I got an answer but I was told that it's wrong.
4. I got an answer and would like my work checked.
5. I have a question about someone else's work/solution.
6. I have completed the problem and don't need help anymore. Thank you.
7. None of the above
sullen zenith
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4

scarlet rootBOT
sullen zenith
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Complementary counting obviously, and then focus just on the vertical lines, and the square the result. So, our answer is 1 - (x/100)^2 where x is how many ways can each of the two choose two random parallel lines (vertical for this case) without them overlapping (they can be same line, but no overlap). I got 60 somehow, and so I got answer of 16/25. But i don't think it's right

near hill
sullen zenith
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Oh yeah!

near hill
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However, by my first count you should have x=16 rather than x=60.

sullen zenith
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hmmm... how?

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Start with the 5 vertical lines, and go case by case, I think u should get 30, and then i multipleid by 2

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could u tell me how u got 16?

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thx

near hill
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Actually now I'm getting 32 not 16. It's a bit of a messy count, though...

sullen zenith
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I did case by case. For a person, I did whether they're choice was length 1,2, or 3

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And then x2 at the end

wraith tartan
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what problem is this from

sullen zenith
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I can't tell sry

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it's part of a paid aops class

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I would appreciate if u could try it tho

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cause i got an answer

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but dont think it's right

near hill
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Okay, even newer count gives me 30 now. ๐Ÿคฆ
My main split is by the distance between the leftmost edge and rightmost edge of either of the two regions:

  • if it's 4 then there are 3+2+1=6 possibilities, depending on the width of the gap being 0, 1, or 2 columns.
  • if it's 3, then there are 2+1=3 possibilities for the gap width and positions, times 2 for whether the outside column is to the left or to the right.
  • if it's 2, then only one possibility for the gap, but there are 3 ways to choose the two neighboring columns.
    The total is now 6+6+3=15, and multiply by 2 to account for which player is choosing the left region, giving 30.
sullen zenith
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lol

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thx for the help tho

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anybody else?

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i think u might be correct actually

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i just need someone to verify

ivory ember
sullen zenith
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Wow!

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Thank you!

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Time for me to solve it myself now

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the casework L(

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๐Ÿ™

ivory ember
sullen zenith
#

Wow!

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Thank u so much for the time and effort to do that!

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U r the best!

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PIGEON FOR THE WIN!!

ivory ember
honest epoch
#

-# (not my handwriting)

mighty egret
#

i can try

obsidian plank
#

On avarage how many question do i have to get right in the AIME II to go to the USAMO?

wraith tartan
merry sinew
#

guys suggest me some math topics to learn I'm going to interschool math competition in January 2

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Plz

obsidian plank
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What is interschool?

timber citrus
#

anyone in tmsca

stuck tartan
honest epoch
#

Yeah

stuck tartan
#

i got that the sum is equal to 3sqrt(e)

honest epoch
#

Perfect

stuck tartan
#

its correct?

wraith tartan
sleek ravine
honest epoch
#

Lmao

honest epoch
stuck tartan
#

Alr

sturdy knoll
#

so wait how do you guys suggest i prep for amc

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iโ€™m tryna make aime next year

stable pewter
#

Practice a lot

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Mocks, past tests, aops textbook questions

sturdy knoll
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I struggle in geometry and I try practicing it but the problem is I donโ€™t know what else to practice

stable pewter
#

You can also use the aops textbooks for some concepts

sturdy knoll
#

like in geometry

sturdy knoll
#

online*

stable pewter
sturdy knoll
#

shit

stable pewter
#

The only free books ik are mastering the amc 10/12

jagged violet
#

(What I did fr)

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Aops textbooks helped a lot for me at least

jagged violet
#

The problemsets are pretty good imo

stable pewter
surreal willow
stable pewter
#

thats what i did but idk if i should be recommending it

surreal willow
#

Well I mean

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If they want to pirate it they can

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Itโ€™s their choice

stable pewter
#

true

pallid tundra
#

<@&268886789983436800> piracy discussion

remote phoenix
#

@glacial quarry we cannot allow discussion of piracy methods on this server due to discord TOS.

pallid tundra
#

server rules prohibit discussion of piracy since discord would get on modsโ€™ case otherwise

#

yea that

remote phoenix
#

also goes for @jagged violet

acoustic jetty
#

Indeed, realistically I don't think any of us mods are actually ethically opposed to piracy, or at least out spokenly so, but discord is mean :(

glacial quarry
#

sry

surreal willow
raven scaffold
#

alright i just sent in the email

surreal willow
#

You know what they say

#

Snitches get stitches :))))))

slate grove
#

infinite series formula for e:

$$
e = 1 + \frac{1}{1!} + \frac{1}{2!} + \frac{1}{3!} + \frac{1}{4!} + \frac{1}{5!} + \frac{1}{6!} + \cdots = \sum_{n=0}^{\infty} \frac{1}{n!}
$$

Written out fully for first few terms:

$$
e = 1 + 1 + \frac{1}{2} + \frac{1}{6} + \frac{1}{24} + \frac{1}{120} + \frac{1}{720} + \cdots
$$

Where $$ n! = n \times (n-1) \times \cdots \times 1 $$.

This infinite sum converges exactly to Eulerโ€™s number $$ e \approx 2.71828 $$.

near hill
empty merlin
low steeple
honest epoch
little wigeon
#

might be a lil illegal but ive done it for many of my physics textbooks

opal locust
#

it's the power series expansion of the exponential function

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$e^x = \sum_{n=0}^\infty \frac{x^n}{n!}$

gilded haloBOT
icy drift
gloomy torrent
subtle sundial
#

son ๐Ÿ˜ญ๐Ÿ˜ญ๐Ÿ˜ญ

stable pewter
#

im crine ๐Ÿ˜ญ ๐Ÿ˜ญ ๐Ÿ˜ญ

soft vigil
simple ore
#

Gif name tho?

slate grove
#

Hi

wintry olive
prime bluff
#

hey everyone I have 4 ish spots for a HMMT feb team in Chicago. Please DM me if youโ€™re interested/want more info! You also have to be from chicago.

fast atlas
#

I see a lot of olympiad combinatoric problems have solutions involving graph theory. I'm a fan of graph theory myself, I wonder where I can read more about those

hollow cobalt
#

is it tuff

thin stratus
#

guys i have my math comp in a few months, any advice to start preparations

kindred egret
thin stratus
obsidian rock
pallid tundra
sullen zenith
#

Yo anybody here have an HMMT Feb. Team with some spots (north cal). i really want to join pls

tacit fog
#

i have a math comp in 2 days (saturday) and ive done this many times, but i also wanna help the others who are joining me

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any tips on how to teach effective math?

mortal ridge
gloomy torrent
#

lol

pallid tundra
#

youโ€™d be better served having them practice past papers for whatever contest youโ€™re doing

unkempt quest
wraith tartan
thin pumice
carmine sapphire
#

Anyone doing AMC 10 A/B AMC 8 or IMC

thin pumice
carmine sapphire
#

scores/

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?

long garden
#

๐Ÿ’€

carmine sapphire
#

yup

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how do u know

long garden
#

huh

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wdym..

carmine sapphire
#

that i go to rsm

long garden
#

like imc is rsm

granite zenith
#

Can somebody help me to solve the following problem: there are n sticks of the length 1,2,โ€ฆ,n. How many incongruent triangles can be formed by using any of three sticks

low olive
#

since every stick is at different length

kindred wraith
low olive
#

i did???

#

do i take n>=3

thick gale
thick gale
granite zenith
low olive
# granite zenith Why did u choose combinations?

i mean thats quite obvious, it's about choosing or arranging stuffs
for example you want to choose 3 players in a class with 30 people for a football team then the way to choose is 30C3 (aka choosing 3 out of 30)
now how about a class a n (n>=3) students? then its nC3
so apply the same to your question tho

granite zenith
#

I mean if u choose for example sticks with length 1,2,3, u will not be able to build a triangle because of the triangle inequality

low olive
#

ah

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it gets harder now

granite zenith
#

Yeah

low olive
#

sorry for that i will try to solve again

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lets multiply step by step

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then any condition for n

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ok yea its integer lol sorry im so dumb

granite zenith
granite zenith
#

Understandable, but thanks for trying! @low olive

low olive
#

wiat i think im continuing this

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lemme think a bit more lol

granite zenith
#

Oh ok ok

low olive
#

ok i give up, sorry for disturbing you so much

granite zenith
#

Well, dude i also didnโ€™t have any clue how to solve it so I just uploaded it here, @low olive

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And I looked the answer in my textbook (i just wanted to solve it myself or at least to ask the community)

low olive
#

still need to go the complex way๐Ÿซ 

granite zenith
#

Yeah

low olive
#

i thought of new value to solve but i thought there must be a simplier way

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but i guess there isnt?

granite zenith
#

It is complicated for me as well

granite zenith
low olive
#

3 pages of solving is crazy

granite zenith
#

So its like a partition of a set

granite zenith
#

I think i will play Minecraft now

#

I am too overwhelmed

low olive
#

yes

slim yew
#

When are AMC 12A scores out?

surreal willow
#

Ask your teacher for em

carmine sapphire
#

is a

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87 good on amc

surreal willow
#

For 12 ye

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For 10 not really

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But close to aime

carmine sapphire
#

12

vernal axle
vernal axle
low olive
granite zenith
brave cave
#

I don't know if this is considered competition math or not but i was wondering whether my attempt was correct or not.
Limit of n!/n^n
This one is pretty interesting because my own professor didn't know how to solve it.

IMG_20251206_151043.jpg IMG_20251206_151037.jpg
dawn radish
#

correct

simple blaze
ornate blade
# simple blaze

by scaling you can let c = 1:
e.g (2, 4, 6) is the same direction as (20, 40, 60)

#

so now what are a, b?

granite zenith
near hill
near hill
# brave cave I don't know if this is considered competition math or not but i was wondering w...

Wait, are you talking about $\lim_{n\to \infty} \frac{n!}{n^n}$ instead of the partial "Exercise 3 Let $(u_n)_{n\ge}$"? In that case the limit is 0:
$$\frac{n!}{n^n} = \frac{1}{n}\cdot\frac{2}{n}\cdot\frac{3}{n}\cdots\frac{n-1}{n}\cdot\frac{n}{n}$$
Each of the factors is at most 1, and half of them are at most $\frac12$, so their product is smaller than $(\tfrac12)^{n/2}$, which goes to 0 as $n\to\infty$.

gilded haloBOT
#

Troposphere

217922183169572864.png
brave cave
brave cave
#

@near hill

near hill
brave cave
#

And how did we deduce that their product is smaller than (1/2)^n/2

brave cave
near hill
#

$$\frac{n!}{n^n} \le \frac{(n/2)!}{n^{n/2}} = \frac{1}{n}\cdot\frac{2}{n}\cdots\frac{n/2}{n} \le \frac{n/2}{n}\cdot\frac{n/2}{n}\cdots\frac{n/2}{n} = \left(\frac12\right)^{n/2}$$

#

(That's for even n; there'd be a very small bit of additional footwork to make it fully rigorous for odd n too).

gilded haloBOT
#

Troposphere

217922183169572864.png
brisk osprey
#

hi

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I require some assistance please.

bold yacht
#

this looks interesting

#

perhaps ask for help in

brisk osprey
#

okay

bold yacht
#

@brisk osprey

simple blaze
ionic smelt
#

uhh this might be concerning, but i have been not paying attention to my olympiad classes lmao

#

and the comp is next friday opencry

#

am i cooked?

surreal willow
#

Yes ๐Ÿ‘

high goblet
#

<@&268886789983436800> ongoing competition

near hill
#

Which competition?

high goblet
#

ritangle

#

unless it concluded in which case mb

near hill
#

Uh, can you be less implicit?

#

In other words, how do I convince myself that you're right it's an ongoing competition before I take action?

high goblet
#

yh it's still going

image.png
jovial bobcat
#

unless im wrong?

near hill
#

Hmm, can you tell me how to find the question on that site? There's no link on "final challenges released".

high goblet
#

you have to solve the previous problems to access the last set

high goblet
jovial bobcat
near hill
high goblet
jovial bobcat
#

rather than asking someone to do the problem

#

i may be wrong though

high goblet
near hill
#

But I think we've seen enough to nix this. @brisk osprey, don't use this server to cheat on ongoing competitions.

high goblet
#

also ig this is also leaking clues

jovial bobcat
#

i suppose

brisk osprey
#

I meant I just needed helped understanding the bold text

#

not the

near hill
#

(Relevant posts deleted).

brisk osprey
#

apologies for confusion.

high goblet
brisk osprey
#

no the code is correct

#

Iโ€™m asking where ive misunderstood

#

to be getting incorrect answers

high goblet
high goblet
brisk osprey
#

I did not know this.

high goblet
#

if you are genuinely confused by the wording of the problem, i'd recommend you email your teacher

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who will best advise you on what to do

brisk osprey
#

thank you

#

itโ€™s just on weekends we cannot do that endeavour

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as itโ€™s banned

#

I just need help on the gear rotations and if physics has to be implemented.

near hill
#

You were clearly told not to do that.

brisk osprey
#

itโ€™s the question numbers

high goblet
near hill
#

Nonetheless. No discussion of ongoing contests.

granite zenith
# vernal axle I think this one is much easier

Well, @vernal axle, I looked up what a generating function is, but could you please explain your solution in more detail? I canโ€™t quite follow it, and Iโ€™m not sure how a generating function should be applied here.

brisk osprey
#

you then input it into the correct question number

high goblet
# high goblet

but also yes it does very much say "teams should not seek help from online forums or elsewhere"

brisk osprey
#

okay then

#

no more of this.

near hill
#

It will be too difficult to moderate if we have to make detailed decisions about whether a question actually leaks information or constitutes cheating.

high goblet
brisk osprey
#

Iโ€™d like some help on equations of gear rotations if possible

vernal axle
# granite zenith Well, <@450039711520522240>, I looked up what a generating function is, but coul...

Ok, suppose you want to count the number of pairs (a,b) of non-negative integers such that a+b=n.
You may consider a product of series (1+x+x^2+...)(1+x+x^2+...) If you expand the product you get that the coefficient at x^n is exactly the required number of pairs, since it is formed by sum of products: 1 * x^n+x * x^(n-1) +...+x^n * 1
i.e. the number of times the sum of exponents of x equals n:
0+n, 1+(n-1),..., n+0.
On the other hand 1+x+x^2+... = 1/(1-x). So, the required number of pairs is just the coefficient at x^n of the series 1/(1-x)^2, which equals binomial(n+1,1)=n+1, and which is obviously true.
Similarly for that problem above we want 2a+b+c+d=n-4.
So, we have to take 1/(1-x) three times and 1/(1-x^2) one time because it equals 1+x^2+x^4+...

#

so, we get g(x)=1/(1-x)^3*1/(1-x^2)

#

the rest is just a manipulation with the rational function g(x) and its partial fractions decomposition

vernal axle
low olive
#

find the limit x->0+ of x^x
how to do this lol

opal locust
carmine sapphire
low olive
stable pewter
#

the limit after lhopitals should be -x and as x goes to 0 from the right its js 0

#

and then e^0 = 1 -> lim = 1

low olive
#

wdym

#

lnx x cant be 0 though??

#

its undefined

low olive
#

limx-->0+ of x^x by that equals to 0

stable pewter
#

as x goes to 0 (from the right), the exponent goes to 0, thus it becomes e^0 = 1

low olive
#

what happens to lnx if it approaches 0

#

from the right

stable pewter
#

but for xlnx

#

its 0*(-inf)

#

thats an indeterminate form so you can use lhopitals

low olive
#

ah the logarithm function curve goes right down to -inf as it approaches 0, isnt it?

stable pewter
#

yes

low olive
#

0*(-inf) should be zero since 0*anything equals 0?

#

like every single x

stable pewter
low olive
#

how do i get rid of that though? do i bring to ratio the same as i did

stable pewter
#

xlnx -> lnx/1/x -> 1/x/-1/x^2 -> -x^2/x -> -x

#

lim as x goes to 0 from the right is 0

low olive
#

so 1/e^x as x reach inf into 0

uncut grotto
low olive
#

thanks everyone๐Ÿซก

worthy basalt
#

how useful are cyclotomic polynomials and zsigmondy's theorem in math olympiad

foggy current
#

I think I am cooked on the real test

IMG_5646.jpg
#

It has grade 10 math

hollow cobalt
#

$\int e^{\tan x}(\sec x - \sin x) dx$

gilded haloBOT
glossy umbra
foggy current
glossy umbra
#

is it fully over

foggy current
#

In one hour I didnโ€™t even get half of the questions

#

And got even less correct

#

This was practice test 2

glossy umbra
#

are they asking the same topics

#

consistently

foggy current
glossy umbra
#

like probability

#

or calculus

foggy current
#

No not that grade 10

#

Maybe lower

glossy umbra
#

just get your theory down

#

and it will be fine

foggy current
glossy umbra
#

I mean theres no way around it

#

just gotta learn

foggy current
#

Yeah

hollow cobalt
#

this like basic stuff

glossy umbra
hollow cobalt
#

depends on the level of questions

glossy umbra
#

dude he is younger then us

glossy umbra
hollow cobalt
#

when i was younger i didnt have problem with this stuff

#

now that im entering the rabbit hole shits getting serious

glossy umbra
hollow cobalt
#

also tbh its harder cuz of the reduced attention spans

glossy umbra
hollow cobalt
#

yeah i feel like they havebeen nerfed hard

glossy umbra
#

lol you're talking like you are 30

pale gull
worthy basalt
jaunty ginkgo
#

What have you tried?

worthy basalt
#

chaatgpt gave me 4

#

i tried using padic valuation

jaunty ginkgo
worthy basalt
#

p=2

worthy basalt
#

i think..

grim whale
#

and still teacher is still being mad for my writing style

#

nobody can read my writing

stuck tartan
worthy basalt
#

i did that and im stuck ๐Ÿ‘€

stuck tartan
#

Let a-y=x

#

So then get 2^y-1 =n!/2^x

#

U could probably use zsigmondy with bounding arguments to show thereโ€™s no solutions for y>4

worthy basalt
#

chat gpt also gave me that sol

#

the thing is the proof for it is kinda complicated (for me)

#

just wondering if there was any other sol

stuck tartan
#

Uhhh

#

Probably js straight bounding arguments then probably

worthy basalt
#

hm ok ill tyr

stuck tartan
#

Or taking mod 3

worthy basalt
#

mm ok

#

would u consider zsigmondy as 'heavy artillery'

#

or its actually quite well known and im just ass..

#

bruh i just found out about catalan's conjecture and its proof is even more ๐Ÿ’€

high goblet
analog dagger
#

q
ive a fun one, prove that no rational numbers x,y exist such that x + y + 1/x + 1/y =2025

if so, find a real solution for the above.

near hill
#

Where is this from?

analog dagger
#

rmo 2025

near hill
#

OK, it looks like that is not ongoing anymore.

dull plinth
#

Hey!! ๐Ÿ‘‹ alpha 's , beta 's , gamma 's and thetha's !!!

Department of mathematics is here to bring all the math enthusiasts together.

If you think, your favourite pastime is hustling with integrals๐Ÿค” , exploring the labyrinth of mathematics concepts๐Ÿ‘€ , mathematical finance seems appealing to you๐Ÿ˜€ or you find maths a rich source for memes ๐Ÿ™ˆetc,etc .

Find all this in one place as ,The Maths Department is going to conduct the "National Mathematics Week" , on the occasion of Birth anniversary of India's renowned mathematician Ramanujan.

Register๐Ÿง‘โ€๐Ÿ’ปat the speed of exponential growth function!!!!

Date - 15 to 19th December 2025.

Detailed information is attached.

Register Here: https://forms.gle/2FK6vZp28UzFAvTZ8

Google Docs
National Mathematics Week 2025

On the occasion of the Birth anniversary of famous Indian mathematician Ramanujan, the Maths Department of SVNIT is going to conduct various exciting events with rich variety according to different interests of students. Be the one to take up the initiative or maybe a challenge!!

Link for Rulebook
Link for Posters

wet grove
worthy basalt
#

no idea..

#

but i think this question is harder than an a1

outer vessel
blazing comet
#

is anyone doing ritangle...

chrome gate
wraith tide
#

,ask minimal polynomial of T(x, y) = (-y, x)

gilded haloBOT
worthy basalt
#

nice problem

image.png
wary crypt
#

any useful sites to practice for national olympiads?
any strategies or topics which are absolutely necessary?

pallid tundra
#

AoPS contest collections has an absolute glut of past contest problems to practice with

glossy falcon
#

I don't understand why the number of parameters decrease by 3

Screenshot_2025-12-11-18-20-46-282_cn.wps.moffice_eng-edit.jpg
#

In the last paragraph they say the number of parameters decrease by 3, because the sum of the vectors should be 0. Shouldn't it decrease by 2?

merry spire
#

Guys any tips i have provincial olympiad in 2 days

#

anyone?๐Ÿ˜ญ

sacred ether
#

As a person who wants to do data science, there's data analysis questions in maths on my entrance and I do not know what to do

stone lynx
#

???

sacred ether
# stone lynx ???

Imagine getting a graph and being asked to interprete it on the basis of profit, cost, investment and other stuff

ivory ember
# glossy falcon In the last paragraph they say the number of parameters decrease by 3, because t...

Since this is a spatial linkage, every vector $\mathbf{u}_i$ has three components. So, $\sum \mathbf{u}=\mathbf{0} \implies \sum x_i=\sum y_i=\sum z_i=0$. Each of these equals removes one degree of freedom (or parameter) from the system, thus reducing the total number of parameters by $3$. (Note that because the spatial linkage is defined to have the vectors on a sphere, the vectors are 3-dimensional and not 2-dimensional).

gilded haloBOT
#

Civil Service Pigeon

560122149126275093.png
hidden locust
#

I Wana compete but I don't know where to start from

glossy falcon
burnt mauve
#

Woah

glossy falcon
burnt mauve
#

I only got proficiency for AMC :/

novel glacier
#

australia

hollow cobalt
hollow cobalt
#

its the reversal of vu'-uv/v^2

amber tundra
#

hello I have my school exams in a month can any one suggest me study tips and methods

#

please

full kiln
ivory ember
# glossy falcon But, because the length of the vector is given, one of the 3 components is depen...

Each vector does only contribute two free paramteters since the length is fixed. However, the constraint $\sum \mathbf{u}_n=\mathbf{0}$ are \textit{global} constraints on the $2N$ parameters (aka they are not local to each vector). So, they are independent, meaning that they remove three degrees of freedom (one degree of freedom per equation). \ \

As a sanity check, for $N=3$, you have a triangle with fixed side lengths (which has no degrees of freedom up to rigid motion). So, the number of parameters in the case where $N=3$ should be $0$. Subtracting only $2$ instead of $3$ would fail to have this happen.

gilded haloBOT
#

Civil Service Pigeon

560122149126275093.png
lime mesa
#

Anyone doing ukmt this january (intermediates)

soft vigil
#

when you search for like amc or aime problems the aops page doesnt even pop up

glossy falcon
ivory ember
severe eagle
burnt mauve
#

Its 53/135 marks

#

my friend got prize :/

#

thats 124/135

#

and hes not even a math nerd like me

#

my other friends: high dist, dist, credit and credit

severe eagle
#

you tried your best

#

do you know why you didnt do well?

burnt mauve
#

and i canโ€™t do it next year because i have camp in that term

#

when the contest is running

#

so ig ill have to do it in year 10

severe eagle
#

aw

#

gl

amber tundra
novel karma
#

No way b cutoff is 105 ๐Ÿ˜ญ ๐Ÿ˜ญ ๐Ÿ˜ญ

wraith tartan
#

hopefully not

#

hopefully 97.5

sacred shell
#

The cutoffs

novel karma
novel karma
#

I think itโ€™s a troll tho

sacred shell
#

think so to

wraith tartan
soft vigil
sacred shell
#

yeah ik

#

just a recent thread

tacit prairie
#

any advice or help with Middle school Math Olympiad? I'm 7th grade, took lots of practice tests but still not confident im only getting 4/5 on the tests would like to make 5/5

long garden
long garden
tacit prairie
# long garden moems?

Ya those are what Iโ€™m currently doing.. Iโ€™ve practiced with the old tests as well.. just looking for more help

spark scaffold
#

This should be part of it

IMG_1557.png
snow thistle
#

for b

#

maybe 129

edgy osprey
#

how did you guys originally break into competition math like study-wise where did you start off with

snow thistle
#

like i got introduced to comp math when i was in elementary school

#

but if ur a highschooler then just go straight into amc 10 really

edgy osprey
#

alr

#

but like any resource ideas? ive been like watching aops textbook video lessons but like

snow thistle
#

uhh

#

i think reading aops vol1 textbook is a good starting place

#

but after that i wouldnt reccomend reading any of the other books

#

unless u feel like theres a subject that youre specifically struggling in

#

like after reading aops vol1 u should just start doing amc 10 questions

edgy osprey
#

alrighty thanks

earnest sedge
#

guys, are there any globally recognized math competitions that i can participate in, i graduated high school already and im in my gap year for uni

jaunty ginkgo
#

Those are only 2 undergraduate math competitions I know

earnest sedge
agile gazelle
jaunty ginkgo
jaunty ginkgo
maiden yarrow
#

seems like its pi in the internet well

near hill
maiden yarrow
#

yes , tan inverse expansion..

long garden
#

its definitely a lot harder than moems but theres no harm in overpreparing

#

pick up some skills to take amc8 ig

summer crown
scenic cape
#

if q25 gives me 25 i get 84.5........

#

...............

#

BRO

#

PLS DONT TELL ME THATS REAL

#

BPOAJGPOSDJ

#

oh nvm 82.5

#

but still

#

๐Ÿ™

#

guys im so confused

#

it's not out yet right

#

pls

sacred shell
#

yeah it aint out

scenic cape
#

Are those fake?

sacred shell
#

yeaa

#

Last years or fake

novel karma
#

My heart dropped when I saw that tho ๐Ÿ˜ญ ๐Ÿ˜ญ

clear violet
#

Hi

tranquil dagger
#

bro what kinda leaks

#

did yall see teh 12a distribution ๐Ÿ˜ญ

tiny eagle
#

I got a 97.5 on B

#

Ts is rigged

#

Iโ€™m done

formal ice
#

Yo what the fuck

quartz pumice
#

Fr

sand echo
#

How do u get good at maths

#

High-school maths

quartz pumice
#

Practice ๐Ÿ™

sand echo
#

Hmm

quartz pumice
sand echo
#

But like what concepts are the base fundamentals that 20% that make up 80% of maths or high-school maths

quartz pumice
formal ice
#

was there a leak or something

sand echo
quartz pumice
jagged violet
#

Bro what are these cutoffs

long garden
#

how the HELL

jagged violet
#

This cannot be real

long garden
#

is dhr cut

jagged violet
long garden
#

for 12a

jagged violet
#

Cheaters

#

Tbh im happy with my scor

#

For 10b

#

Atleast I made HR

long garden
#

shouldnt cuts be lower this year

jagged violet
#

Yeah

#

Theres a lot of cheaters tho

long garden
#

because first 15 were harder than usual

#

predicted low 90s to a 105 is wild

#

ppl were literally predicting <90 ๐Ÿ’€

long garden
#

oh hey its you!

formal ice
#

lmao

long garden
#

i mean i did see that um

#

youtube shrot video

formal ice
#

and chatgpt

long garden
#

isnt chatgpt stupid

#

didnt it get like a 30 on amc

#

how tf

formal ice
#

idk someone on forums said that it fullscored 12B

#

or some other llm

long garden
formal ice
#

cursed ahh histogram

sj8VMkZ.png
long garden
#

wait i heard 12b was really easy though

formal ice
#

yeah

#

some r saying 12b easier than 10b

long garden
#

ive heard

#

god what are jmo cutoffs gonna be this year

#

like a 450.5?? ๐Ÿ’€

formal ice
#

genuinely fried

wraith tartan
#

WHAT

#

150 FOR HR ON AMC 12b

#

*a

#

AND 12b higher than 10b WTFFFFFFF

#

at least I got 100.5 on 10b :))

stuck tartan
#

thank god i got like an alr score on the 12b otherwise it would've been wraps

inland turtle
#

Hi

#

Im new here and just wanna chat about maths.

snow thistle
#

more people got 150 than 90 on 12a

#

and the dhr cuts are higher than 10 for a and b

#

haha

#

"yes my name is maa yes i let students cheat and yes my test quality is becoming shit"

#

i didnt even dhr ๐Ÿ˜ญ

#

i was predicting 129 dhr for 10b ๐Ÿ’”

tranquil dagger
#

They actually need to stop paper tests and make it exclusively online

#

Or maybe just close it to only USA

tranquil dagger
snow thistle
#

the online etests were horrible too

#

its so easy to cheat

#

theres no lockdown browser or anything u can just chatgpt

snow thistle
#

so they can see it no matter what

#

most of the people selling tests are just proctors in china

tranquil dagger
#

They should make it like the portals for deca bro

#

Any input that isnโ€™t in the window or isnโ€™t a left click gets flagged

novel glacier
#

so many cheaters lol

carmine sapphire
#

what did yall get on 10ab and 12ab

#

if u took it

ripe crater
#

guys if a hypothetically aime qual do i have to take it at the same center i qualed

carmine sapphire
#

what u guys get

novel glacier
#

109.5

#

12b

scenic cape
#

Cutoff out

#

96 for 12a is insane

#

Wtf bro

echo solstice
#

What are these cutoffs

#

Huh

sacred shell
#

Tf is this

#

Even 97 couldnโ€™t get me thru ๐Ÿ˜ญ

#

dhr 150 no wayyy

echo solstice
#

Holy cheaters

sacred shell
#

True that

#

They didnโ€™t even count international ppl this time
๐Ÿ˜ญ

#

Imagine if they did

scenic cape
glacial quarry
scenic cape
#

Bro 12a dhr

#

No one got 150

#

No one gets dhr ig

glacial quarry
#

Bruh for 10a ppl were telling me 94.5 would likely make it and the cutoff was 105 ๐Ÿ˜ญ thankfully my 10b was good enough

scenic cape
#

Do students get additional 6 for q25 for 12a

sacred shell
#

yeah I think they even included it in the cutoffs

#

The plus6

#

bmt and smt get rigged anyways

#

Not even amc now๐Ÿ˜ญ

scenic cape
#

What percentage is 84.5 for 12a

#

Just wanna write it for my linkedin

#

Bro

#

Tf

#

So stupid

#

So 82.5 is like top 25% of the participants?

tranquil dagger
#

4.5*

scenic cape
#

I didnt answer either

#

So i get 4.5?

stuck tartan
sacred shell
scenic cape
#

What is 82.5 on 12a as a percentile

pallid tundra
#

in the big 25?????

#

god DAMN

#

i seem to remember the cutoffs going sub100 back when i was in hs

snow thistle
#

cause of p25 void

#

so technically a 144, 145.5 and 150 were all turned into 150s cause of the void

runic trellis
#

bruh

#

how is it 150

#

๐Ÿ’”

#

i got a 138 by studying for like hours everyday but wtf

long garden
#

theres always next year

#

unless youre an unc

scenic cape
long garden
#

the number of ppl i heard were using chatgpt

#

on ts

long garden
long garden
echo solstice
#

the cheat rate at our school might be over 10% ๐Ÿ˜ญ

tranquil dagger
#

Whattt

#

My schools had cheaters but not from leaks

#

Just copying off one of the smart guys answers

echo solstice
#

one of them didnt even qual ๐Ÿคฆโ€โ™‚๏ธ

tranquil dagger
#

Eh that doesnโ€™t fly in our school

long garden
#

isnt chatgpt supposed to get like

tranquil dagger
#

We r proctored lightly but still enough to get caught not having the test on ur screen

long garden
#

30 on amc

tranquil dagger
#

No

#

It can 150 it lol

#

Aime is different

long garden
echo solstice
snow thistle
snow thistle
snow thistle
snow thistle
#

honewstly the 10 cutoffs are not that bad

long garden
snow thistle
#

like a little high for the test difficulty but nothing crazy

snow thistle
long garden
#

i just saw 150 for amc12 dhr and was like

#

uhh

snow thistle
#

yeah thats stupid

#

idk i know someone who got 150 on 12a and b though

#

he said it was actually just really easy this year

long garden
#

cue the 50,000 flamewars on aops

long garden
snow thistle
#

aops is like the worst place ever

#

ppl on there actually do a whole lotta nothing

#

like anything but actually doing math

long garden
#

LMFAO the kids all getting ragebaited

long garden
snow thistle
#

wait

#

r u elainehan

long garden
#

no ๐Ÿ’€

snow thistle
#

oh

long garden
#

i know her thogh

snow thistle
#

thats my friends friend

long garden
#

which friend's friend

snow thistle
#

emily

long garden
#

i might know them

snow thistle
#

i mean

long garden
#

moonlight?

snow thistle
#

moonlight11

#

or something like that

#

yeah

#

i go to school w her

long garden
#

orz

long garden
snow thistle
#

its like

#

really good now

#

i have chatgpt plus and it can do any aime question

long garden
#

thats concerning

snow thistle
#

pretty sure gemini got 35.42

#

35/42

long garden
#

holy shit

#

https://chatgpt.com/pricing?utm_source=google&utm_medium=paidsearch_brand&utm_campaign=GOOG_C_SEM_GBR_Premium_CHT_BAU_ACQ_PER_MIX_ALL_NAMER_US_EN_081125&utm_term=chatgpt plus&utm_content=184333759660&utm_ad=778419668392&utm_match=e&gad_source=1&gad_campaignid=22874197666&gbraid=0AAAAA-IW-UXduxk04alV2fJeMbBV2vBja&gclid=Cj0KCQiAgP_JBhD-ARIsANpEMxxiIcRppTfYC3EJGkmWLcasEQf_DqM4WaKbt1F1zY7oJiUjqEJuEm0aAlqlEALw_wcB

ChatGPT Plans | Free, Plus, Pro, Business and Enterprise

Paid plans (Plus, Pro, Team, and Enterprise) are priced per user per month. We offer monthly plans for Plus, Pro, and Team and annual plans for Team and Enterprise.

#

200 dollars a month for pro is crazy work

long garden
snow thistle
#

chatgptalso got 35/42 actually

long garden
formal ice
#

not #15 tho #owned

soft vigil
long garden
arctic narwhal
#

man i keep selling on aime

novel glacier
#

cheating happens through people having the test beforehand

#

people have MAA insiders

#

this year it was mass leaked

#

and people got it for free

sacred shell
#

all the procturing they have is a screen share in a zoom meeting of 1000 ๐Ÿ˜ญ

arctic narwhal
#

i always taken it at my school on paper

novel glacier
#

theres cheating in every single olympiad

#

its so sad

sacred shell
#

pretty sad :((