Question

What are two consecutive odd numbers whose sum is 40?

Answer 1

`19` and `21`

Explanation:

Let `n` be a odd integer

Then `n+2` would be the consecutive odd integer after `n`:

The sum of these is 40:
`n+(n+2)=40`
`2n+2=40`
`2n=38`
`n=19`
`n+2=21`