## The Math Chat BookMathematics can be fun for everyone, and this book shows it. It grew out of the author's popularisation of mathematics via live, call-in TV shows and widely published articles. The questions, comments, and even the answers here come largely from the callers and readers themselves, and so the book covers the kind of mathematical problems that people are interested in, not those that professional mathematicians, writers or even publishers think people should be interested in. The book makes no attempt to fit any mould. Although written by a research mathematician, it goes where the callers and readers have directed it, over a wide range of topics and levels. Everyone paging through it will be captured by something of interest, whether they consider themselves interested in mathematics or not. |

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### Contents

Riddle OClock | 3 |

Does the Sun Rise in the East? | 5 |

Leap Years | 9 |

The Perfect Calendar | 15 |

Where Does the New Millennium Begin? | 17 |

PROBABILITIES AND POSSIBILITIES | 23 |

Baby Boys and Girls and World Population | 25 |

Predicting the Random | 29 |

New Largest Prime Numbers | 53 |

Four 4s | 57 |

Powers of 5 | 60 |

The 2000 Census | 68 |

Can a Computer Have Free Will? | 70 |

GEOMETRY | 75 |

The Double Soap Bubble Breakthrough | 77 |

Shortest Road Networks | 82 |

The Bible Code and Personal Coincidences | 32 |

Incomparable Dice and TicTacToe | 34 |

Crossing a Rickety Bridge at Night | 36 |

Ideal Coinage | 38 |

Infinitely Many PingPong Balls | 39 |

Testing for AIDS | 41 |

Magicians Kings and Queens | 42 |

Attic Lights Marathons and Fuse Timers | 44 |

Presidents Names | 47 |

Presidential Elections | 49 |

PRIME NUMBERS AND COMPUTING | 51 |

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