by Theresia

(Jakarta, indonesia)

Ben and Jon had $270 altogether. Ben decided to give a quarter of what he has in exchange for a third of what Jon has. As a result of the exchange, they both had an equal amount of money.

How much did Ben have at first?

**Here's My Answer**

by Zach

(Singapore)

This question involves the Constant Total Concept.

To view video clip of the solution, click here