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Paving the Way

A man paved a square courtyard and then decided that it was too small. He took up the tiles, bought 100 more and used them to pave another square courtyard. How many tiles did he use altogether?

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Square Areas

Can you work out the area of the inner square and give an explanation of how you did it?

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Chess

What would be the smallest number of moves needed to move a Knight from a chess set from one corner to the opposite corner of a 99 by 99 square board?

Opposite Vertices

Age 11 to 14 Challenge Level:
The interactivity in Square Coordinates may help you to visualise tilted squares.
You can challenge yourself by playing Square It against the computer.