Question

What number can be divided into 2 and 9 equal groups without a remainder

Answer 1

One way to determine the number is to multiply 2 and 9, this is because the resulting number will be divisible by them perfectly. Let's try:

`2\cdot9=18`

So our candidate is 18, we need to test if it's divisible by 2 and 9 perfectly:

`\begin{gathered} (18)/(2)=9 \\ (18)/(9)=2 \end{gathered}`

It is, therefore the number is 18.