MATHEMATICS TEACHING

1. | 2 + 2 = 2 x 2 | 2. | Three. One of each. |

3. | 81 square metres. | 4. | 73cm or 0.73 metres. 13 (the other factor) would be ridiculous |

5. | Half a square metre. | 6. | 49 |

7. | 9814072356 It contains all 10 digits, once and once only. |
8. | 92p a yard (by 0.6p) |

9. | £45 | 10. | 52.45 square cm. |

11. | Each point would be the vertex of regular tetrahedron. | 12. | 20 cm. |

13. | 4.00 cm (to 3 sig. figs) | 14. | The sum of the even numbers (by 50). |

15. | 9 zeros. | 16. | 7.5 km. |

17. | 24 km. | 18. | 5 (5 + 5 + 5 + 5) = 100 |

19. | Arranged alphabetically by their spelling. eight, five, four, nine . . . . two, zero. |
20. | 18 |

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