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 least possible number of large chips?
B for number of big
S for number of small
S = B + a prime number
B+S=54
so
B+B+a prime = 54
2B + a prime = 54
2B is even
So can the prime be even or odd?
You can finish it.
A prime number can't be even. Oh wait. There is a single prime number that is even.
