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'Weekly Problem 41 - 2006' printed from http://nrich.maths.org/

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The Pythagoras Patisserie sells triangular cakes at 39p each and square buns at 23p each. For her party, Helen spent exactly £5.12 on an assortment of these cakes and buns. How many cakes and how many buns did she buy?
 
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This problem is taken from the UKMT Mathematical Challenges.

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