Jack wants to write down some of the numbers from 1 to 100 on a piece of paper. He wants to do it in such a way, that no two numbers on the piece of paper will add up to 125. How many numbers, at most, can Jack write down on his piece of paper?
Half of 125 is 62.5
So if the biggest number was 62 then 2 of them could not add to 125.
So I expect the answer is 62.