Question

7. If a= 2 X 3. b = 2 X 3 X 5, c=3" x 5 and LCM (a,
b, c) = 23 x 32 x 5, then n=
(a) 1
(b) 2
(c) 3
(d) 4

Answer 1

a= 2^3 x 3

b= 2x3x5

C= 3^nx5

answer is b=2