Question

Find the smallest square number which is exactly divisible be 6,12 and 20

Answer 1

lcm of 6 ,12 ,20 = 60
60 is not a perfect square
factor of 60 = 2×2×3×5
here we need extra 5 and 3 so it would become perfect square
our new no is = 2×2×3×3×5×5 = 900