find the smallest square no. divisible by 8,15,20?
8 = 2 x 2 x 2
15 = 3 x 5
20 = 2 x 2 x 5
So, LCM = 2 x 2 x 2 x 3 x 5=120
As 3 and 5 are not in pair in LCM’s factor so we need to multiply 120 by 5 and three to make it a perfect square.
Required Number = 180 x 3 x 5 = 2700