Question

The product of two coprime numbers is $117,$ then their $L.C.M.$ is

• A. $9$
• B. $13$
• C. $39$
• D. $117$

Answer 1

The correct option is D

$117$

Co-prime numbers are the numbers whose common factor is only $1.$

$117$ can be written as

$117=13\times 9$

$H.C.F.$ of co-prime numbers is always $1.$

$H.C.F\times L.C.M=$ product of $2$ numbers

$1\times L.C.M.=117$

$L.C.M.=117$

Hence option $\left(D\right)$ is the answer.