Question

If you have 70 red blocks and 84 green blocks, what is the greatest number of identical block stacks that can be made without any blocks leftover?

Answer 1

84/70=1.2 so the ratio of g:b must be 1.2:1 but we have to deal with integer amounts so...

1.2:1=6:5   

So you can make (84/6)  14 stacks of 6 green and 5 reds