Find the common factors of the numbers :

$33$ and $77$

Find the common factors of the numbers :

$13$ and $52$

Find the common factors of the numbers :

$45$ and $81$

Find first three common multiples of the numbers.

$6$ and $8$

Find first three common multiples of the numbers.

$10$ and $15$

Find first three common multiples of the numbers.

$4$ and $6$

Find first three common multiples of the numbers.

$12$ and $16$

Find out by what greatest number the given numbers are divisible:

$12,22$

Find out by what greatest number the following numbers is divisible:

$20,35$