Question

find the smallest square number which is divisible by each of the number 8, 15 and 20​

Answer 1

The smallest number as such would be the LCM of the 3 numbers.

LCM (8, 15, 20) -:

8 = 2³

15 = 3 x 5

20 = 2² x 5

LCM = highest power of every term.

=> LCM (8, 15, 20) = 2³ x 3 x 5 = 120

Thus, the required answer is 120.