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Squaring the Circle

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.

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Sissa's Reward

Sissa cleverly asked the King for a reward that sounded quite modest but turned out to be rather large...

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Silver Line

Weekly Problem 40 - 2008
A class raises money for charity by placing 10p pieces edge to edge in a 'silver line'. If the line was 25m long, how much money did they make?

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

A student bought 17 pencils for £1.44. He paid 2 pence more for each coloured pencil than for each plain pencil. How many of each kind did he buy at what price?