Question

Find the smallest square number divisible by each one of the number 8,12,15,20?​

Answer 1

8=2×2×2

12=2×2×3

15=3×5

20=2×2×5

LCM= 2×2×2×3×5=120

But for perfect sq number we have to multiply by 2×3×5= 30 because these numbers are required for completing paired

So required no= LCM×30= 120×30

=3600