How a simple sequence of sums can predict a perfect result

'1089' Trick · 3:17 · Video: Gresham College · Watch at the source

In short: Experience a mathematical sleight of hand where a series of calculations with random numbers always leads to the same destination. This video explores the '1089' trick, revealing the underlying logic that makes this numerical magic possible.

Robin Wilson, Gresham Professor of Geometry, demonstrates the '1089' trick, a classic mathematical puzzle where the final result of a specific sequence of additions is predicted with perfect accuracy regardless of the starting numbers.

The video serves as part of a larger series titled 'A Millennium of Mathematical Puzzles,' aiming to uncover the hidden structures behind recreational mathematics and how they can be used to create seemingly impossible feats of mental calculation.

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