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__Multiple of 4__

Below is a list of the first 50 multiples of 4. From the list, we can see that, the first two digits of the numbers repeat after 100.04 | 08 | 12 | 16 | 20 |

24 | 28 | 32 | 36 | 40 |

44 | 48 | 52 | 56 | 60 |

64 | 68 | 72 | 76 | 80 |

84 | 88 | 92 | 96 | 100 |

104 | 108 | 112 | 116 | 120 |

124 | 128 | 132 | 136 | 140 |

144 | 148 | 152 | 156 | 160 |

164 | 168 | 172 | 176 | 180 |

184 | 188 | 192 | 196 | 200 |

Therefore, we can conclude that

If the first two digits of a number is a multiple of 4, then the number if a multiple of 4.For example,

Is 2973648 a multiple of four?

The first 2 digits of the number is 48, and 48 is a multiple of 4, hence 2973648 is a multiple of 4.

Let's see another example:

Is 987654324682 a multiple of four?

The first 2 digits of the number is 82, and 82 is not a multiple of 4, hence 987654324682 is not a multiple of 4.

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__Multiple of 8__

A similar rule can be applied to identify the multiple of 8.If the first three digits of a number is a multiple of 8, then the number if a multiple of 8.For example,

Is 2973648 a multiple of eight?

The first 3 digits of the number is 648, and 648 is a multiple of 8, hence 2973648 is a multiple of 8.

Let's see another example:

Is 987654324682 a multiple of four?

The first 3 digits of the number is 682, and 682 is not a multiple of 8, hence 987654324682 is not a multiple of 8.

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