My 7 year old son was given this question as a sort of bonus question and although I managed to solve it using some really awful simultaneous equations I can't help but think there is a simpler more intuitive way to solve it. Afterall, it was given to a 7 year old.
The question is this:
Amir, Brett and Carly share some money.
Amir gets a third of the money.
Carly gets 5 times the as much as Brett.
Carly gets £84 more than Amir
How much money does Brett get?
Is there a really simple way to solve this? Any help is much appreciated