Write the following number as the product of two different prime numbers.

$91$

Write the following number as the product of two different prime numbers.

Write the following number as the product of two different prime numbers.

Write the following number as the product of two different prime numbers.

Find the HCF of the following numbers by prime factorization method.

$52, 80$

Find the HCF of the following numbers by prime factorization method.

Find the HCF of the following numbers using the method of dividing by common factors.

$30, 72, 84$

Find the HCF of the following numbers using the method of dividing by common factors.

Find the LCM of the following numbers by the prime factorization method.

$16, 25, 40$