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Each square, laid out on the grid, will reveal a number, when clicked. Players must click 2 numbers at a time.

In this game, players are looking for pairs of numbers that are either double, or half the partner. Players will receive a score for each pair correctly identified. Any non-pairs incorrectly checked as pairs will generate a tally also.

If 2 numbers are believed to be a pair, click the . However, they do not make a pair, click the .

The score will show how many pairs and non-pairs have been correctly identified.

- There are 12 unique pairs. Since, for example, 2 goes with 1 and 4 and 4 goes with 2 and 8, If the same pair is seen more than once, the computer will alert the player that that pair has already been seen. If the tick has been clicked, the player will still get the point, but the cards will be reset, rather than cleared.
- If a number is clicked on twice, usually by accident, the player will receive an alert telling them to look for halves and doubles.

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