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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: | ||||

672 and 252 is ____ | 540 and 240 is ____ | 1050 and 1260 is ____ | 270 and 405 is ____ | 216 and 324 is ____ |

1120 and 420 is ____ | 2205 and 1470 is ____ | 1200 and 1350 is ____ | 1400 and 1050 is ____ | 108 and 162 is ____ |

840 and 420 is ____ | 630 and 420 is ____ | 486 and 324 is ____ | 1890 and 1050 is ____ | 6615 and 1470 is ____ |

980 and 1176 is ____ | 280 and 420 is ____ | 300 and 120 is ____ | 500 and 1250 is ____ | 1890 and 420 is ____ |

1400 and 2100 is ____ | 3430 and 13720 is ____ | 4410 and 2205 is ____ | 3150 and 700 is ____ | 252 and 588 is ____ |

2450 and 1750 is ____ | 1080 and 945 is ____ | 450 and 360 is ____ | 2625 and 3375 is ____ | 1764 and 2058 is ____ |

630 and 945 is ____ | 600 and 300 is ____ | 336 and 756 is ____ | 1750 and 700 is ____ | 560 and 420 is ____ |

980 and 1764 is ____ | 1890 and 1575 is ____ | 588 and 1568 is ____ | 224 and 168 is ____ | 13720 and 8575 is ____ |

1470 and 420 is ____ | 1120 and 980 is ____ | 4725 and 2100 is ____ | 1470 and 5145 is ____ | 588 and 1568 is ____ |

1260 and 700 is ____ | 1050 and 1260 is ____ | 1764 and 2205 is ____ | 1875 and 3125 is ____ | 1260 and 1890 is ____ |

2250 and 3375 is ____ | 5880 and 1470 is ____ | 2352 and 588 is ____ | 2205 and 1470 is ____ | 96 and 64 is ____ |

630 and 1470 is ____ | 1960 and 980 is ____ | 7000 and 6125 is ____ | 720 and 270 is ____ | 13720 and 12005 is ____ |

3150 and 2800 is ____ | 3920 and 4410 is ____ | 270 and 1080 is ____ | 6125 and 4900 is ____ | 120 and 96 is ____ |

1050 and 700 is ____ | 360 and 810 is ____ | 1701 and 1134 is ____ | 2835 and 1890 is ____ | 1470 and 2352 is ____ |

3150 and 2835 is ____ | 5145 and 8232 is ____ | 756 and 1134 is ____ | 882 and 1764 is ____ | 270 and 360 is ____ |

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

735 and 96 is ____ | 735 and 1152 is ____ | 54 and 96 is ____ | 196 and 882 is ____ | 54 and 2058 is ____ |

315 and 288 is ____ | 735 and 600 is ____ | 196 and 192 is ____ | 210 and 2240 is ____ | 56 and 1008 is ____ |

135 and 280 is ____ | 294 and 896 is ____ | 315 and 576 is ____ | 140 and 560 is ____ | 60 and 320 is ____ |

196 and 168 is ____ | 150 and 120 is ____ | 84 and 210 is ____ | 126 and 1008 is ____ | 84 and 768 is ____ |

490 and 48 is ____ | 54 and 560 is ____ | 24 and 378 is ____ | 60 and 252 is ____ | 525 and 504 is ____ |

60 and 504 is ____ | 350 and 840 is ____ | 126 and 1176 is ____ | 350 and 36 is ____ | 1029 and 1280 is ____ |

490 and 540 is ____ | 196 and 2016 is ____ | 1029 and 72 is ____ | 210 and 168 is ____ | 135 and 1120 is ____ |

36 and 64 is ____ | 225 and 480 is ____ | 490 and 1680 is ____ | 1225 and 280 is ____ | 150 and 84 is ____ |

90 and 1344 is ____ | 490 and 1792 is ____ | 210 and 72 is ____ | 210 and 1008 is ____ | 1050 and 210 is ____ |

140 and 3584 is ____ | 140 and 540 is ____ | 210 and 1344 is ____ | 36 and 280 is ____ | 90 and 48 is ____ |

490 and 672 is ____ | 294 and 160 is ____ | 135 and 126 is ____ | 135 and 600 is ____ | 189 and 672 is ____ |

84 and 256 is ____ | 210 and 768 is ____ | 196 and 1050 is ____ | 490 and 288 is ____ | 60 and 144 is ____ |

40 and 144 is ____ | 490 and 1764 is ____ | 1715 and 80 is ____ | 140 and 196 is ____ | 735 and 504 is ____ |

36 and 320 is ____ | 36 and 375 is ____ | 441 and 48 is ____ | 490 and 360 is ____ | 140 and 1225 is ____ |

294 and 672 is ____ | 24 and 525 is ____ | 735 and 192 is ____ | 490 and 882 is ____ | 350 and 756 is ____ |

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