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# Countdown

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Age 7 to 14

Challenge Level

*Countdown printable sheet
Countdown printable sheet - cards*

Here is a chance to play a version of the classic **Countdown Game**.

The challenge is to use the numbers available and the four standard operations (addition, subtraction, multiplication and division) to hit the target.

Start by choosing any six cards. The top row always contains the numbers 25, 50, 75 and 100, and the bottom row contains the numbers 1 to 10. Alternatively you could click on "Quickstart". Then click on "Generate new target" and the computer will choose a target.

You can only use each card once in your solution, and it is always possible to find a solution.

You may like to explore different levels of the game using the Settings menu (the purple cog).

Once you've had a go, click on "Show solutions" to show some possible ways in which the target can be reached.

There are four equal weights on one side of the scale and an apple on the other side. What can you say that is true about the apple and the weights from the picture?

Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make an estimate.