Skip to main content
### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Stop the Clock

## You may also like

### The Puzzling Sweet Shop

### Little Man

Links to the University of Cambridge website
Links to the NRICH website Home page

Nurturing young mathematicians: teacher webinars

30 April (Primary), 1 May (Secondary)

30 April (Primary), 1 May (Secondary)

Or search by topic

Age 5 to 7

Challenge Level

- Problem
- Getting Started
- Student Solutions
- Teachers' Resources

You could print off a sheet of blank clocks (Word document or pdf) to record the times you and your partner choose.

Play the game several times. What do you notice?

What happens if your opponent gets to 10.30? Why?

How can you make sure you get exactly on 12 o'clock? What time would you leave on the clock so that you can get to 12.00 on your next go, after your opponent has been?

So, what time would you want the clock to say on the go before that?

How can you work out these "key times" that you must "land on" on your way to the target?

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?

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?