Stage: 3 Challenge Level: 
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?
Simultaneous equations. Estimating and approximating. biology. Factors and multiples. Integers. Discussion. Place value. Diophantine equations. Properties of numbers. Mathematical reasoning & proof.
Published September 1998.
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