How many integers from 1 to 200 are divisible by neither 3 nor 5?

Explanation

Multiples of 3 = 66, of 5 = 40 and of 15 = 13, so those divisible by 3 or 5 number 66 + 40 − 13 = 93, and 200 − 93 = 107 are divisible by neither.