### Five Coins

Ben has five coins in his pocket. How much money might he have?

### The Puzzling Sweet Shop

There were chews for 2p, mini eggs for 3p, Chocko bars for 5p and lollypops for 7p in the sweet shop. What could each of the children buy with their money?

### Little Man

The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?

# Stop the Clock

##### Age 5 to 7Challenge Level

A number of pupils from Mortimer School in England sent in their solutions.

Alice and Oliver:

When your partner is doing 1/2  an hour you should do a 1 hour.

Aaron and Mustafa:
Get the clock on to half past ten and then try and make him use half an hour and you use 1 hour so it goes on to 12 o'clock.

What would happen if your partner didn't use half an hour?  Could you still win?

Harry and Gabe:
I pressed 1 hour when it was 11

Luke and Eve:
We think that you have to press 5 hours and 2 half hours for player 1 to win the game and 4 hours and 3 half hours for player 2 to win the game.

Dylan and Jacob:
We wrote that we did 1 hours and half an hour.

Thank you very much for these contributions.  The difficulty is to find a way of winning that ALWAYS works.

Rhys from St. Michael's on the Mount in Bristol, England, sent in this email:

With this strategy if you go second you are guaranteed to win.
The aim is to get to 7.30, then 9.00, then 10.30 - after that you have won.
If player one goes to 6.30 you would go 1 hour to 7.30.
If player 1 goes to 7.00 on their opening move you would then go half an hour to 7.30.

That is a fantastic strategy, Rhys.  I wonder if anyone can explain why it works?