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Yih or Luk Tsut K'i or Three Men's Morris

Age 11 to 18 Challenge Level:

Some puzzles requiring no knowledge of knot theory, just a careful inspection of the patterns. A glimpse of the classification of knots and a little about prime knots, crossing numbers and. . . .

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Yin Yang

Age 7 to 11 Challenge Level:

Can you reproduce the Yin Yang symbol using a pair of compasses?

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You Can't Make an Omelette...

Age 11 to 16

Can you devise the most efficient strategy for finding the highest floor from which you can drop an egg safely?

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You Never Get a Six

Age 7 to 11 Challenge Level:

Charlie thinks that a six comes up less often than the other numbers on the dice. Have a look at the results of the test his class did to see if he was right.

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You Never Get A Six Poster

Age 7 to 11 Challenge Level:

You Never Get A Six - December 2007

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You Owe Me Five Farthings, Say the Bells of St Martin's

Age 11 to 14 Challenge Level:

Use the interactivity to listen to the bells ringing a pattern. Now it's your turn! Play one of the bells yourself. How do you know when it is your turn to ring?

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You Tell the Story

Age 7 to 11 Challenge Level:

Can you create a story that would describe the movement of the man shown on these graphs? Use the interactivity to try out our ideas.

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Young Children's Mathematical Recording

Age 3 to 7

In this article, Janine Davenall reflects on children’s personalised mathematical recordings as part of a small research project based in her Reception class.

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Your Number Is...

Age 7 to 14 Challenge Level:

Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?

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Your Number Was...

Age 11 to 14 Challenge Level:

Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?

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Your Solutions

Age 5 to 11

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Your Solutions - Stage 3 & 4

Age 11 to 16 Challenge Level:

Recently solved Stage 3 & 4 problems.

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Your Solutions - Stage 4 & 5

Age 14 to 18 Challenge Level:

Recently solved Stage 4 and 5 solutions.

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Your Solutions!

Age 7 to 11