Express the following number as the product of prime factors.

$756$

Express the following number as the product of prime factors.

$9240$

Find the HCF of the following numbers by means of prime factors.

$48$ and $108$

Find the HCF of the following numbers by means of prime factors.

$120$ and $216$

Find the HCF of the following numbers by means of prime factors.

$72$ and $90$

Find the HCF of the following numbers by means of prime factors.

$52$ and $78$

Find the HCF of the following numbers by means of prime factors.

$100$ and $125$

Find the HCF of the following numbers by means of prime factors.

$154$ and $88$

Find the HCF of the following numbers by means of prime factors.

$546$ and $624$