Pls help

[pine spoke]

Capacity of Greg's mug = Water in measuring jug A / 3
Capacity of Martin's mug = Water in measuring jug B / 6

Then you can find the answer by subtracting.

[bitter birch]

Firstly 800/4= 200
Secondly calculate the size of martin cup 1800/6 300ml per mug
Thirdly find th e diff
300 -100=100ml