AP and GP problem!

[karmic tartan]

A high school student completes his Biology test, which consists of 10 true or false questions, and tells his friends:
— My answers followed a pattern of incomplete arithmetic progression of ratio 1 for true options, in which each term was separated by a false alternative. The answer key ended with a true alternative.
Another student declares:
— No, you are wrong! The progression of true answers is complete geometric progression of ratio 2, separated by false alternatives. The sequence ends with a false alternative.
In the final result, both students discover that they got the same grade: 9.
Which of the following alternatives represents the maximum number of false alternatives that the test could have?
A. 1
B. 2
C. 3
D. 4
E. 5

[kindred socket]

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[languid laurel]

start from the GP person

since you know how they answered

that’s a pretty good starting hint

[karmic tartan]

Hey, I'm not asking for answers, but were you able to do this question? Is it clear how it should be done?

[languid laurel]

wait does it say “the answer key ended with true” or is that a translation thing

cuz it makes the problem really boring since we know the GP sequence

[languid laurel]

^

[karmic tartan]

Might be a problem with translation, I just put it in the google translator

[languid laurel]

the other thing i don’t get is like whatever the incomplete AP is

like i assume it just means it’s like for the T/F sequence 1 1 2 1 3 1 4 1 the answers are a snapshot of the sequence?

[karmic tartan]

Yeah, it probably is

Thank you anyway, I'm a little lost with the bot instructions, how do I thank you with the math ranks bot?

[last ledge]

if you have no further queries, simply type +close

make sure to press the red and blue buttons

[karmic tartan]

Ok, thank you

+close

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[last ledge]

welcome!

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