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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: | ||||

630 and 2835 is ____ | 2025 and 1575 is ____ | 7350 and 9800 is ____ | 1260 and 840 is ____ | 2100 and 1050 is ____ |

2625 and 2100 is ____ | 504 and 882 is ____ | 560 and 1120 is ____ | 3375 and 2250 is ____ | 980 and 1120 is ____ |

1080 and 1215 is ____ | 2058 and 2646 is ____ | 360 and 270 is ____ | 1960 and 1470 is ____ | 540 and 450 is ____ |

2940 and 2450 is ____ | 270 and 450 is ____ | 7350 and 6125 is ____ | 882 and 588 is ____ | 810 and 360 is ____ |

144 and 108 is ____ | 2450 and 6125 is ____ | 840 and 420 is ____ | 216 and 192 is ____ | 2025 and 675 is ____ |

900 and 1800 is ____ | 900 and 500 is ____ | 1890 and 1575 is ____ | 180 and 360 is ____ | 500 and 400 is ____ |

840 and 1890 is ____ | 1050 and 1260 is ____ | 1575 and 3150 is ____ | 378 and 756 is ____ | 1350 and 750 is ____ |

756 and 588 is ____ | 216 and 486 is ____ | 180 and 540 is ____ | 48 and 112 is ____ | 840 and 280 is ____ |

2625 and 3675 is ____ | 400 and 200 is ____ | 200 and 300 is ____ | 1260 and 1470 is ____ | 720 and 450 is ____ |

2625 and 1050 is ____ | 5250 and 7875 is ____ | 600 and 900 is ____ | 1134 and 378 is ____ | 1470 and 2058 is ____ |

980 and 3430 is ____ | 240 and 200 is ____ | 588 and 1470 is ____ | 756 and 672 is ____ | 3675 and 2625 is ____ |

270 and 675 is ____ | 5488 and 6174 is ____ | 1323 and 567 is ____ | 1120 and 560 is ____ | 9800 and 4900 is ____ |

1575 and 2520 is ____ | 750 and 600 is ____ | 588 and 2646 is ____ | 1470 and 1680 is ____ | 288 and 216 is ____ |

600 and 750 is ____ | 1050 and 2100 is ____ | 224 and 392 is ____ | 1260 and 2205 is ____ | 5488 and 2744 is ____ |

1875 and 750 is ____ | 980 and 4410 is ____ | 300 and 200 is ____ | 2835 and 1890 is ____ | 588 and 882 is ____ |

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

525 and 1344 is ____ | 315 and 180 is ____ | 36 and 250 is ____ | 56 and 90 is ____ | 735 and 128 is ____ |

441 and 320 is ____ | 350 and 128 is ____ | 36 and 480 is ____ | 189 and 350 is ____ | 225 and 1120 is ____ |

875 and 768 is ____ | 525 and 576 is ____ | 54 and 720 is ____ | 126 and 192 is ____ | 210 and 288 is ____ |

210 and 288 is ____ | 375 and 384 is ____ | 196 and 2016 is ____ | 294 and 168 is ____ | 525 and 800 is ____ |

525 and 360 is ____ | 100 and 192 is ____ | 225 and 336 is ____ | 315 and 378 is ____ | 350 and 252 is ____ |

189 and 392 is ____ | 315 and 144 is ____ | 735 and 480 is ____ | 140 and 384 is ____ | 150 and 384 is ____ |

490 and 120 is ____ | 350 and 576 is ____ | 350 and 672 is ____ | 735 and 315 is ____ | 525 and 490 is ____ |

225 and 672 is ____ | 875 and 315 is ____ | 490 and 336 is ____ | 135 and 1200 is ____ | 84 and 420 is ____ |

189 and 735 is ____ | 525 and 1152 is ____ | 210 and 180 is ____ | 315 and 560 is ____ | 210 and 576 is ____ |

225 and 588 is ____ | 315 and 192 is ____ | 84 and 48 is ____ | 735 and 192 is ____ | 490 and 180 is ____ |

189 and 504 is ____ | 210 and 375 is ____ | 875 and 840 is ____ | 350 and 288 is ____ | 84 and 324 is ____ |

140 and 864 is ____ | 294 and 180 is ____ | 90 and 288 is ____ | 84 and 882 is ____ | 60 and 1960 is ____ |

294 and 784 is ____ | 315 and 288 is ____ | 90 and 48 is ____ | 441 and 216 is ____ | 36 and 1344 is ____ |

90 and 1400 is ____ | 350 and 480 is ____ | 196 and 210 is ____ | 126 and 1920 is ____ | 350 and 252 is ____ |

189 and 1960 is ____ | 441 and 384 is ____ | 490 and 2352 is ____ | 525 and 72 is ____ | 126 and 72 is ____ |

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