## One to Nine: The Inner Life of NumbersHave you ever thought about the uniqueness and simplicity of One, or what it means to be Two? Is Four really so square and why are there Seven days of the week, Seven deadly sins, or even Seven wonders of the world? In One to Nine, Andrew Hodges brings numbers to life. Inspired by the popularity of Sudoku – and millennia of human attempts to figure things out – this pithy, kaleidoscopic book takes a fresh, witty and hands-on approach to such various topics as musical harmony, code breaking, and probabilities in poker and lotteries. It probes the surprising symmetries of time, space, matter, and forces. It even goes to the heart of what computers can do. Andrew Hodges weaves together the inner life of numbers – the patterns of primes and powers that we try to grasp, and that have us in their grip. Accessible to anyone with a general curiosity and interest in puzzles, One to Nine might even have you completing a fiendish Sudoku in record time. |

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#### One to nine: the inner life of numbers

User Review - Not Available - Book VerdictOxford University mathematician and physicist Hodges (Alan Turing: The Enigma) focuses in nine chapters on the nine integers from one to nine (although the first chapter also includes some necessary ... Read full review

### Contents

The Unloved One | 1 |

To Be or Not to Be | 37 |

Trinidad | 71 |

Its a Square World | 101 |

Fifth Freedom | 147 |

The Ioy of Six | 175 |

The V0nder of it All 215 | 239 |

End Times Table | 283 |

Handson Experience | 321 |

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### Common terms and phrases

Alan Turing binary calculator called century Chapter colour force completely complex numbers Constance Reid counting cube cycle decimal deﬁned deﬁnition diagonal digit dimensions duality Einstein electrons enciphering equivalent example exponential fact factor factorisation Fermat Fermat primes Fibonacci numbers ﬁfth ﬁgure ﬁnd ﬁnding ﬁrst ﬁt ﬁve formula fundamental Gauss geometry gives guess human idea inﬁnite integers large numbers light logarithm logic look magic mathematicians mathematics means Mersenne primes million modulo multiplication noughth nuclear pairs particles pattern Penrose Penrose tilings physical picture possible prediction prime numbers probability problem properties protons puzzle quantum mechanics quarks quasi-crystals quaternions question Quintic equations random ratio recipe rotation scale scientiﬁc sequence shows solve space space-time sphere square root string theory Sudoku symbols symmetry theory three-dimensional tion Turing Turing’s turns twistor twistor space Two-ness weak force zero