Question

4. Find the smallest possible perfect square
number which is exactly divisible by
following set of numbers.
a) 3, 4, 12 and 15 b) 4, 6, 8 and 12
c) 6, 15, 18 and 20
18​

Answer 1

LCM of 4,5,6,15,and18

4=2×2

5=5×1

6=2×3

15=3×5

18=2×3×3

So, L.C.M=2

2

×3

2

×5=180

180 when multiplied by 5 becomes a perfect square.

∴ Required number=180×5=900

answer

ok this is your correct answered