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'Weekly Problem 40 - 2008' printed from http://nrich.maths.org/

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A class decides to raise money for charity using a 'silver line'. They invited people to put 10p pieces edge to edge to make a long line. The completed line was 25m long. Roughly how much money did they make?

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

 

 

This problem is taken from the UKMT Mathematical Challenges.

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