Question

Find the common factors of $8$ and $20$.

Answer 1

Determine the common factor

If a number divides the other number and leaves the remainder as zero then such number is called the factor of the given number.

If a number is a factor of two or more numbers. then such a number is called a common factor of the numbers.

Given,

The factors of the given numbers $8$ and $20$ are

$$\begin{gathered} 8=2\times 2\times 2 \\ 20=2\times 2\times 5 \end{gathered}$$

On observing these factors we can conclude that,

The common factors are, $2$ and $4$

Hence, the common factors of $8$ and $20$ are $2$ and $4$.