Basic Math Examples

21

$21$

Step 1

21

$21$ has factors of

3

$3$ and

7

$7$ .

3 \cdot 7

$3 \cdot 7$

Step 2

Since

21

$21$ has factors other than

21

$21$ and

1

$1$ ,

21

$21$ is a composite number.

21

$21$ is a composite number

[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$