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Worksheet 4 - The Highest Common Factor (HCF) and the Lowest Common Multiple (LCM) (Difficulty level: Very Hard) | ||||
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The Highest Common Factor (H.C.F.) of: | ||||

5145 and 3087 is ____ | 900 and 810 is ____ | 630 and 1575 is ____ | 1960 and 1470 is ____ | 1260 and 1470 is ____ |

2500 and 5625 is ____ | 300 and 420 is ____ | 630 and 270 is ____ | 252 and 882 is ____ | 5145 and 6615 is ____ |

240 and 120 is ____ | 840 and 1260 is ____ | 200 and 500 is ____ | 3150 and 1050 is ____ | 180 and 630 is ____ |

6174 and 8232 is ____ | 630 and 1050 is ____ | 882 and 1470 is ____ | 72 and 216 is ____ | 300 and 600 is ____ |

2646 and 2352 is ____ | 180 and 540 is ____ | 700 and 300 is ____ | 3920 and 3430 is ____ | 3150 and 1050 is ____ |

324 and 288 is ____ | 486 and 216 is ____ | 1000 and 900 is ____ | 2058 and 2744 is ____ | 4802 and 1372 is ____ |

8575 and 13720 is ____ | 378 and 882 is ____ | 1008 and 1134 is ____ | 1134 and 378 is ____ | 1125 and 1350 is ____ |

980 and 1764 is ____ | 7875 and 1750 is ____ | 2625 and 2100 is ____ | 1680 and 840 is ____ | 5145 and 4116 is ____ |

144 and 108 is ____ | 300 and 240 is ____ | 588 and 504 is ____ | 112 and 32 is ____ | 630 and 540 is ____ |

2520 and 2835 is ____ | 588 and 2352 is ____ | 3920 and 2450 is ____ | 2205 and 945 is ____ | 672 and 756 is ____ |

400 and 300 is ____ | 882 and 1176 is ____ | 420 and 336 is ____ | 1764 and 2646 is ____ | 3675 and 5145 is ____ |

300 and 120 is ____ | 560 and 980 is ____ | 1350 and 600 is ____ | 120 and 240 is ____ | 504 and 588 is ____ |

2646 and 2058 is ____ | 336 and 252 is ____ | 810 and 360 is ____ | 2025 and 1350 is ____ | 1680 and 630 is ____ |

420 and 120 is ____ | 180 and 450 is ____ | 750 and 1000 is ____ | 320 and 240 is ____ | 3430 and 3920 is ____ |

336 and 280 is ____ | 180 and 270 is ____ | 108 and 216 is ____ | 2800 and 700 is ____ | 756 and 1008 is ____ |

The Lowest Common Multiple (L.C.M.) of: | ||||

441 and 600 is ____ | 1029 and 896 is ____ | 126 and 576 is ____ | 1029 and 96 is ____ | 315 and 840 is ____ |

315 and 420 is ____ | 250 and 882 is ____ | 24 and 168 is ____ | 525 and 192 is ____ | 54 and 560 is ____ |

2401 and 360 is ____ | 210 and 216 is ____ | 735 and 432 is ____ | 315 and 384 is ____ | 140 and 288 is ____ |

84 and 588 is ____ | 210 and 448 is ____ | 90 and 300 is ____ | 84 and 224 is ____ | 81 and 800 is ____ |

196 and 280 is ____ | 210 and 480 is ____ | 60 and 512 is ____ | 350 and 180 is ____ | 140 and 1029 is ____ |

875 and 450 is ____ | 90 and 2016 is ____ | 210 and 480 is ____ | 210 and 1792 is ____ | 36 and 490 is ____ |

84 and 896 is ____ | 24 and 1000 is ____ | 1029 and 60 is ____ | 40 and 350 is ____ | 140 and 560 is ____ |

375 and 450 is ____ | 1225 and 1400 is ____ | 210 and 162 is ____ | 40 and 288 is ____ | 490 and 240 is ____ |

126 and 432 is ____ | 84 and 240 is ____ | 294 and 768 is ____ | 350 and 1120 is ____ | 40 and 288 is ____ |

210 and 672 is ____ | 140 and 112 is ____ | 210 and 1200 is ____ | 210 and 840 is ____ | 735 and 150 is ____ |

100 and 420 is ____ | 315 and 864 is ____ | 84 and 560 is ____ | 24 and 540 is ____ | 140 and 1960 is ____ |

350 and 720 is ____ | 24 and 448 is ____ | 735 and 875 is ____ | 60 and 800 is ____ | 60 and 1200 is ____ |

84 and 1792 is ____ | 210 and 1680 is ____ | 875 and 560 is ____ | 735 and 96 is ____ | 150 and 1080 is ____ |

490 and 64 is ____ | 525 and 384 is ____ | 150 and 216 is ____ | 490 and 192 is ____ | 84 and 1024 is ____ |

350 and 160 is ____ | 126 and 882 is ____ | 490 and 384 is ____ | 140 and 2240 is ____ | 525 and 672 is ____ |

Copyright 2009 - Adam Malinowski. (Member of CAL, Statutory Licence Schemes)