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### Number and algebra

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### Working mathematically

### For younger learners

### Advanced mathematics

# Mathematical Wizardry

### What's in a Name?

### Unexpected Ordering

### Digit Addition

### Surprising Split

### Truth or Lie

### Your Number Is...

### The Number Jumbler

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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!

Age 5 to 7

Challenge Level

What do you notice about these squares of numbers? What is the same? What is different?

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?

Age 5 to 11

Challenge Level

Try out this number trick. What happens with different starting numbers? What do you notice?

Age 7 to 11

Challenge Level

Does this 'trick' for calculating multiples of 11 always work? Why or why not?

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?

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?

Age 7 to 14

Challenge Level

The Number Jumbler can always work out your chosen symbol. Can you work out how?