Solutions

Question

How many positive three-digit integers are divisible by both 3 and 4?

 

Difficulty Level

Hard

Solution

Option A is the correct answer.

Option Analysis

A number to be divisible by both 3 and 4 should be divisible by the least common multiple of 3 and 4 so by 12.

Number of multiples of 12 between 100 and 999, inclusive is (last-first)/multiple+1

=(996- 108)/12+1=75