List the first five multiples of $20$.

A multiple of a number is a number that is the product of a given number and some other natural number. Multiples can be observed in a multiplication table.

The first five multiples of $20$ can be found by multiplying $20$ by first five natural numbers.

So,

$$\begin{gathered} 20\times 1=20 \\ 20\times 2=40 \\ 20\times 3=60 \\ 20\times 4=80 \\ 20\times 5=100 \end{gathered}$$

Hence, the first five multiples of $20$ are: $20,40,60,80\mathrm{and}100$.