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# Divisibility&Primes

Question | Answer |
---|---|

An integer is Divisibility by 2 if | The integer is even |

An integer is Divisibility by 3 if | The sum of the integer's DIGITS is divisible by 3 |

An integer is Divisibility by 4 if | Divisible by 2 twice, or if the LAST TWO digits are divisible by 4 |

An integer is Divisibility by 5 if | Integer ends in a 5 or 0 |

An integer is Divisibility by 6 if | Integer is divisible by BOTH 2 and 3 |

An integer is Divisibility by 7 if | Only done through long division |

An integer is Divisibility by 8 if | Divisible by 2 THREE TIMES, or if last THREE digits are divisible by 8 |

An integer is Divisibility by 9 if | The sum of the integers digits is divisible by 9 |

An integer is Divisibility by 10 if | The integer ends in 0 |

Define factor | Positive integer that divides evenly into an integer (also called divisors) |

Define multiple | A multiple of an integer is formed by multiplying that integer by any integer |

Created by:
Christopher Dunn
on 2012-12-26