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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: | ||||

320 and 280 is ____ | 1350 and 1200 is ____ | 700 and 400 is ____ | 1500 and 2250 is ____ | 756 and 252 is ____ |

560 and 700 is ____ | 700 and 1750 is ____ | 945 and 1260 is ____ | 600 and 540 is ____ | 882 and 2058 is ____ |

1568 and 588 is ____ | 252 and 168 is ____ | 1575 and 450 is ____ | 1050 and 1750 is ____ | 1575 and 675 is ____ |

810 and 675 is ____ | 1575 and 1260 is ____ | 3920 and 980 is ____ | 2250 and 2025 is ____ | 3675 and 2940 is ____ |

1470 and 1960 is ____ | 630 and 1575 is ____ | 1575 and 1050 is ____ | 2450 and 1470 is ____ | 504 and 378 is ____ |

1960 and 1470 is ____ | 180 and 720 is ____ | 1470 and 2450 is ____ | 882 and 630 is ____ | 168 and 144 is ____ |

700 and 980 is ____ | 360 and 280 is ____ | 1575 and 900 is ____ | 840 and 630 is ____ | 168 and 112 is ____ |

1323 and 2646 is ____ | 120 and 192 is ____ | 420 and 980 is ____ | 756 and 567 is ____ | 420 and 360 is ____ |

1890 and 2835 is ____ | 1680 and 1470 is ____ | 504 and 252 is ____ | 1000 and 750 is ____ | 1350 and 450 is ____ |

1200 and 1350 is ____ | 336 and 168 is ____ | 400 and 500 is ____ | 1701 and 1512 is ____ | 1050 and 420 is ____ |

240 and 360 is ____ | 675 and 1350 is ____ | 1260 and 1470 is ____ | 2835 and 945 is ____ | 420 and 280 is ____ |

360 and 300 is ____ | 1050 and 1575 is ____ | 504 and 378 is ____ | 486 and 108 is ____ | 180 and 360 is ____ |

2800 and 700 is ____ | 945 and 1512 is ____ | 1500 and 1750 is ____ | 320 and 360 is ____ | 900 and 1125 is ____ |

1080 and 675 is ____ | 420 and 1260 is ____ | 270 and 432 is ____ | 720 and 180 is ____ | 1680 and 1470 is ____ |

252 and 324 is ____ | 1350 and 1125 is ____ | 1575 and 4200 is ____ | 480 and 420 is ____ | 2100 and 3150 is ____ |

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

350 and 192 is ____ | 1225 and 1280 is ____ | 60 and 560 is ____ | 210 and 756 is ____ | 735 and 224 is ____ |

210 and 336 is ____ | 294 and 756 is ____ | 1225 and 1920 is ____ | 294 and 432 is ____ | 210 and 360 is ____ |

126 and 432 is ____ | 735 and 180 is ____ | 1029 and 1680 is ____ | 735 and 450 is ____ | 90 and 160 is ____ |

210 and 280 is ____ | 210 and 896 is ____ | 150 and 2352 is ____ | 90 and 2352 is ____ | 490 and 112 is ____ |

350 and 2688 is ____ | 126 and 384 is ____ | 490 and 336 is ____ | 2401 and 1176 is ____ | 60 and 600 is ____ |

735 and 300 is ____ | 294 and 630 is ____ | 294 and 160 is ____ | 210 and 320 is ____ | 294 and 1176 is ____ |

100 and 1470 is ____ | 735 and 270 is ____ | 140 and 112 is ____ | 100 and 1008 is ____ | 60 and 960 is ____ |

135 and 896 is ____ | 126 and 450 is ____ | 686 and 144 is ____ | 1029 and 420 is ____ | 84 and 432 is ____ |

735 and 1176 is ____ | 36 and 432 is ____ | 150 and 336 is ____ | 140 and 126 is ____ | 140 and 1792 is ____ |

294 and 840 is ____ | 375 and 192 is ____ | 490 and 1152 is ____ | 84 and 72 is ____ | 135 and 100 is ____ |

90 and 400 is ____ | 81 and 864 is ____ | 225 and 360 is ____ | 1225 and 256 is ____ | 350 and 224 is ____ |

1029 and 480 is ____ | 40 and 600 is ____ | 150 and 480 is ____ | 24 and 360 is ____ | 135 and 630 is ____ |

24 and 360 is ____ | 84 and 2352 is ____ | 210 and 1960 is ____ | 686 and 216 is ____ | 81 and 72 is ____ |

54 and 48 is ____ | 210 and 384 is ____ | 126 and 700 is ____ | 350 and 315 is ____ | 84 and 420 is ____ |

126 and 350 is ____ | 84 and 3584 is ____ | 150 and 375 is ____ | 490 and 160 is ____ | 225 and 72 is ____ |

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