If we just keep cycling around all the way to 100, does each child get the same number of pieces of paper? Well, just think about it. In order to get the same number of pieces of paper, 100 has to be divisible by 15. And we know 100 isn't divisible by 15. 15 goes into 100 six times. Six times 15 is 90. And you have a remainder of 10.