Ben has five coins in his pocket. How much money might he have?
Vera is shopping at a market with these coins in her purse. Which
things could she give exactly the right amount for?
Lolla bought a balloon at the circus. She gave the clown six coins
to pay for it. What could Lolla have paid for the balloon?
Dan has nine £$2$ coins and his sister Ann has eight £$5$ coins. What is the smallest number of coins that must change hands so that Dan and Ann end up with equal amounts of money?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.