UPSC CAPF Assistant Commandant Model Paper 1

Given number is 88935.
Factorizing 88935 we get,
88935 = 1 × 3 × 5 × 72×112
Thus, in order to make this a perfect square we just have to remove 3 and 5 from its factors as all other terms are in square form.
∴ The least number by which the number should be divided to get a square number is 15.