Challenge Level

Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?

Challenge Level

Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: x2 and -5. What do you think?

Challenge Level

How many solutions can you find to this sum? Each of the different letters stands for a different number.

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Can you work out what step size to take to ensure you visit all the dots on the circle?

Challenge Level

The clues for this Sudoku are the product of the numbers in adjacent squares.

Challenge Level

Imagine you were given the chance to win some money... and imagine you had nothing to lose...

Challenge Level

Play this game and see if you can figure out the computer's chosen number.

Challenge Level

There are nasty versions of this dice game but we'll start with the nice ones...

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Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Challenge Level

A country has decided to have just two different coins, 3z and 5z coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?

Challenge Level

What is the smallest number of answers you need to reveal in order to work out the missing headers?

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What happens when you add a three digit number to its reverse?

Challenge Level

Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?

Challenge Level

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?