Mathematical Wizardry

Mathematical Wizardry

The tasks in this feature all contain tricks that use maths, not magic, to make them work.  Figure out the maths and you too can amaze your friends and family!

The last date for sending in solutions is Monday 8 July. 

Unexpected Ordering live

Age 5 to 7 Challenge Level:
Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?

What's in a Name? live

Age 5 to 7 Challenge Level:
What do you notice about these squares of numbers? What is the same? What is different?

Digit Addition live

Age 5 to 11 Challenge Level:
Try out this number trick. What happens with different starting numbers? What do you notice?

Surprising Split live

Age 7 to 11 Challenge Level:
Does this 'trick' for calculating multiples of 11 always work? Why or why not?

Truth or Lie live

Age 7 to 11 Challenge Level:
Take a look at the video of this trick. Can you perform it yourself? Why is this maths and not magic?

Your Number Is... live

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?

The Number Jumbler live

Age 7 to 14 Challenge Level:
The Number Jumbler can always work out your chosen symbol. Can you work out how?