Do you know a quick way to check if a number is a multiple of two? How about three, four or six?

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

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?

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

Can you find a relationship between the number of dots on the circle and the number of steps that will ensure that all points are hit?

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

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

Use the differences to find the solution to this Sudoku.

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

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

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

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?

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

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

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