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Elastic Numbers: 108 Puzzles for the Serious Problem Solver
"Such a pleasure. A unique and wonderful book!" Imre Leader, Professor of Pure Mathematics, University of Cambridge.
Ashley starts listing numbers 1, 2, 3, 4, 6, 8, 9, 10, ..., missing out every number containing a digit 5 or 7. What is the 1000th number in his list?
This is not an ordinary puzzle book. Beautifully crafted and immensely enjoyable, the problems require minimal technical knowledge, being accessible to young secondary school pupils. However, there is an astonishing range in difficulty; while some of the problems are fairly straightforward, others are significantly tougher, with a great deal of ingenuity and clarity of thought needed to make progress.
Whether you are Elastic Numbers is a unique collection, and will push you to the very edge of your abilities.
Ashley starts listing numbers 1, 2, 3, 4, 6, 8, 9, 10, ..., missing out every number containing a digit 5 or 7. What is the 1000th number in his list?
This is not an ordinary puzzle book. Beautifully crafted and immensely enjoyable, the problems require minimal technical knowledge, being accessible to young secondary school pupils. However, there is an astonishing range in difficulty; while some of the problems are fairly straightforward, others are significantly tougher, with a great deal of ingenuity and clarity of thought needed to make progress.
Whether you are Elastic Numbers is a unique collection, and will push you to the very edge of your abilities.
116 pages, Paperback
Published March 19, 2017
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