Question

The product of two numbers is $2160$ and their HCF is $12$. The LCM of these numbers is
(a) $12$
(b) $25920$
(c) $180$
(d) none of these

Answer 1

(c) $180$

Here, H.C.F. $=12$
Product of two numbers $=2160$

We know:
L.C.M. $\times$ H.C.F. $=$ Product of the two numbers

L.C.M. $=2160÷$ H.C.F.

$=2160÷12$

$=180$

L.C.M. $=180$