15717 | Using Choice, you can cut up a small ball and make an enormous one from the pieces |

15712 | 1 and 0, then add for naturals, subtract for negatives, divide for rationals, take roots for irrationals |

15711 | The rationals are everywhere - the irrationals are everywhere else |

15714 | 'Commutative' laws say order makes no difference; 'associative' laws say groupings make no difference |

15715 | 'Distributive' laws say if you add then multiply, or multiply then add, you get the same result |

15713 | The first million numbers confirm that no number is greater than a million |