Make a factor tree for the number $48$.

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

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

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

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

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

Find the first $5$ multiples of $5, 8$ and $12$.

Circle the numbers that are multiples of $8$.

$3, 8, 16, 20, 24, 28, 30, 32, 40, 41, 42, 48, 52, 56, 60, 63, 64, 72$.

In the numbers given below, circle the multiples of $5$. Put a square around the multiples of $10$. List their common multiples.

$$\begin{gathered} 1, 2, 3, 4, 5, 6, 7, 8, 9, \\ 10, 11, 12, 13, 14, 15, 16, 17, 18, \\ 19, 20, 21, 22, 23, 24, 25, 26, 27, \\ 28, 29, 30, 31, 32, 33, 34, 35, 36, \\ 37, 38, 39, 40, 41, 42, 43, 44, 45 \end{gathered}$$