If $6=2 imes 3$ and $20=2^2 imes 5$, then their HCF and LCM respecti…

Question

If $6=2	imes 3$ and $20=2^2	imes 5$, then their HCF and LCM respectively are

Accepted Answer

B. $2$ and $60$

The common prime factor is only $2$, and the smallest power common to both numbers is $2^1$, so $\operatorname{HCF}=2$. For the LCM, take the greatest powers of all primes involved: $2^2	imes 3	imes 5=60$.

Answer

$2$ and $30$

Answer

$6$ and $20$

Answer

$1$ and $120$

If $6=2\times 3$ and $20=2^2\times 5$, then their HCF and LCM respectively are