Question

Three numbers are in the ratio of 3:5:7. If their sum is 840, what are the 3 numbers?

Answer 1

`168, 280, 392`

Explanation:

The numbers `3`, `5` and `7` are in the ratio `3:5:7`, but their sum is just `3+5+7 = 15`.

So to get a sum of `840`, multiply through by `840/15 = 56` to get:

`168`, `280` and `392`