# Identify the number before and after a given two-digit number

1. | 1 less, 1 more than 15 | |

2. | 1 less, 1 more than 17 | |

3. | 1 less, 1 more than 20 | |

4. | 1 less, 1 more than 8 | |

5. | 1 less, 1 more than 12 | |

6. | 1 less, 1 more than 37 | |

7. | 1 less, 1 more than 45 | |

8. | What Comes Next? - first even number after 13 | |

9. | What Comes Next? - first odd number after 13 | |

10. | What Comes Next? - first odd number after 12 |