Mathematical Wizardry
All of the tricks in this feature seem magical, but it's mathematics that makes them work. Figure out the maths behind the tricks, and amaze your friends and family with your mathematical wizardry!
The Number Jumbler Age 7 to 14
Challenge Level
Challenge Level
The Number Jumbler can always work out your chosen symbol. Can you work out how?
Your Number Is... Age 7 to 14
Challenge Level
Challenge Level
Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?
Your Number Was... Age 11 to 14
Challenge Level
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?
Twisting and Turning Age 11 to 14
Challenge Level
Challenge Level
Take a look at the video and try to find a sequence of moves that will untangle the ropes.
More Twisting and Turning Age 11 to 16
Challenge Level
Challenge Level
It would be nice to have a strategy for disentangling any tangled ropes...
All Tangled Up Age 14 to 18
Challenge Level
Challenge Level
Can you tangle yourself up and reach any fraction?
Mysterious 6174 Age 14 to 18
Challenge Level
Challenge Level
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.