You have to find ways of using 4 numbers to match a target number exactly.

You don't have to use all the numbers - but you can use each number only once.

You can add, subtract, multiply, divide and even put them together.

Each level will vary the number of signs you can use and the choice of digits will be reduced to increase the difficulty.

Remember, there is always more than one way to reach the target number.

If you want to see your workings, press the = button. If you want to give up, press SEE ANSWER.

When you think that you've got the correct answer, press SUBMIT.