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Why Do Buses Always Come in Threes?

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Price: £14.99

Item code: WHYB

Learn the maths behind a wide range of facts with this number-crunching book. Presented in a fun way, it tells you how the speed of a tennis serve is measured and how you can win on the lottery.

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  • UK Standard Delivery including Channel Islands and Northern Ireland - £3.99. FREE OVER £50
  • Express Delivery with delivery the next working day if ordered before 1pm - £8.99
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