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Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?

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Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.

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Two by One

An activity making various patterns with 2 x 1 rectangular tiles.

Fault-free Rectangles

Stage: 2 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Where does the smallest rod need to go?

For rods that are all the same, it may help to start in the middle. Try to break up the lines with every rod you place at first. In the end you should be able to fill in the edges of the rectangle.