Let's make the factor tree of $30$.

Find the common factors of $25$ and $40$.

What is the HCF of prime numbers?

Find the common factors of $28$ and $42$.

Make a factor tree for $14$. Do not use $1$ as a factor.

Make a factor tree for $40$. Do not use $1$ as a factor.

Using prime factorization method, find the HCF of the following numbers:

$144, 180$ and $192$

Make a factor tree for $48$. Do not use $1$ as a factor.

List out the factors of $36$ and $45$. Also, write their common factors.                  

Using prime factorization method, find the HCF of the following numbers:

$3,192$ and $14,280$

Make a factor tree for $15$. Do not use $1$ as a factor.

Make a factor tree for $32$. Do not use $1$ as a factor.

Using prime factorization method, find the HCF of the following numbers:

$72$ and $144$

Make a factor tree for $50$. Do not use $1$ as a factor.

Find the common factors of $36$ and $30$.

Highest common factor of two numbers is greater than each of the two numbers.

List out the factors of $49$ and $63$. Also, write their common factors.             

Using prime factorization method, find the HCF of the following numbers:

$24, 36$ and $90$

Make a factor tree for $21$. Do not use $1$ as a factor.