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Ups & Downs, Professor Backwards, Digit Demolition & Spy Series
Beginning with IDisk-OO on the cover O an ingenious game of profession O here are 25 fiendish puzzles that challenge your ability to think in numbers.
- Uncover the hidden pattern of IWhatIs the Connection?O Accept the 4,500 year-old dare of a Lo-Shu Magic Square. Get a tasted of factorials, toy with symmetry and geometry. Even step inside the brain of renowned mathematician Karl Friedrich Gauss.
- Bring a pencil, but remember O (1) you donIt have to be a whiz to play, because (2) the most important skills youIll need are curiosity and an open mind. (Solutions and explanations are provided of course!)
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