Question

find smallest square number that is divisible by each number 8 15 20

Answer 1

LCM of 8, 15 and 20 = 2 x 2 x 2 x 3 x 5= 120.
here, 2,3 and 5 are not in pairs, so we need to multiply the LCM with 2 x 3 x 5= 30.
smallest square number divisible by 8, 20 and 15 = 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5= 3600