Question

At the Kennel, the ratio of dogs to cats is 2:1. If there are 10 dogs, how many cats are there? Asked by a 9 year old.

Answer 1

there are 5 cats in the kennel

Answer 2

There are 5 cats

2 is the double of 1       
10 is the double of 5

therefore there are 5 cats in the kennel

I hope this was easy to understand