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Can you use this information to work out Charlie's house number?

Special 24

Age 7 to 11 Challenge Level:

Why do this problem?

This problem gives practice in calculating, but it also offers a good point from which to open up a challenge and allow pupils freedom to explore (see the ideas below).

Key questions

What number could you try?
Will you need to try a bigger or smaller number next?

Possible extension

This sheet gives some possible extension ideas.