There are 54 chips in a box. Each chip is either small or large. If the number of small chips is greater than the number of large chips by a prime number of chips, what is the greatest possible number of large chips?

The smallest prime number is 2, so if we take 2 away frome 54 we get 52, divid 52 by 2 to find the number of large chips and you get 26, from here, the largest number of large chips that you can get is 26.