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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: | ||||

1764 and 2646 is ____ | 630 and 840 is ____ | 3675 and 1050 is ____ | 96 and 120 is ____ | 486 and 270 is ____ |

108 and 324 is ____ | 1050 and 2450 is ____ | 392 and 224 is ____ | 1750 and 1250 is ____ | 2520 and 1575 is ____ |

2058 and 1764 is ____ | 252 and 336 is ____ | 1125 and 3000 is ____ | 504 and 336 is ____ | 630 and 1680 is ____ |

700 and 1120 is ____ | 1260 and 1680 is ____ | 1764 and 3969 is ____ | 216 and 486 is ____ | 1470 and 630 is ____ |

840 and 630 is ____ | 2625 and 3150 is ____ | 1500 and 3000 is ____ | 2450 and 3150 is ____ | 2100 and 4725 is ____ |

2450 and 2800 is ____ | 420 and 504 is ____ | 1125 and 1575 is ____ | 420 and 168 is ____ | 630 and 360 is ____ |

1260 and 700 is ____ | 3500 and 6125 is ____ | 6860 and 3430 is ____ | 630 and 504 is ____ | 1134 and 252 is ____ |

540 and 450 is ____ | 392 and 336 is ____ | 1470 and 3675 is ____ | 420 and 360 is ____ | 3087 and 882 is ____ |

432 and 486 is ____ | 5488 and 1372 is ____ | 6615 and 2205 is ____ | 945 and 810 is ____ | 882 and 3969 is ____ |

2940 and 5145 is ____ | 1050 and 3150 is ____ | 2352 and 1470 is ____ | 1500 and 1350 is ____ | 360 and 420 is ____ |

1764 and 1176 is ____ | 560 and 420 is ____ | 1050 and 1890 is ____ | 1575 and 1050 is ____ | 2205 and 5880 is ____ |

378 and 1134 is ____ | 3500 and 2625 is ____ | 4200 and 2625 is ____ | 504 and 1008 is ____ | 672 and 588 is ____ |

13720 and 12005 is ____ | 3675 and 2450 is ____ | 2744 and 4116 is ____ | 2450 and 1400 is ____ | 3675 and 2625 is ____ |

2058 and 1176 is ____ | 1470 and 1960 is ____ | 448 and 224 is ____ | 2520 and 2835 is ____ | 5880 and 2205 is ____ |

3969 and 2646 is ____ | 3430 and 980 is ____ | 840 and 1680 is ____ | 1008 and 882 is ____ | 630 and 420 is ____ |

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

36 and 720 is ____ | 126 and 1600 is ____ | 140 and 630 is ____ | 84 and 1536 is ____ | 60 and 144 is ____ |

60 and 126 is ____ | 315 and 672 is ____ | 225 and 216 is ____ | 490 and 1050 is ____ | 490 and 144 is ____ |

81 and 672 is ____ | 24 and 1152 is ____ | 490 and 1960 is ____ | 84 and 350 is ____ | 100 and 336 is ____ |

1029 and 1152 is ____ | 210 and 600 is ____ | 210 and 216 is ____ | 56 and 392 is ____ | 441 and 750 is ____ |

60 and 1176 is ____ | 1225 and 480 is ____ | 40 and 96 is ____ | 36 and 120 is ____ | 735 and 72 is ____ |

210 and 48 is ____ | 525 and 336 is ____ | 100 and 1008 is ____ | 350 and 490 is ____ | 1715 and 360 is ____ |

315 and 168 is ____ | 84 and 216 is ____ | 1029 and 1792 is ____ | 100 and 1008 is ____ | 294 and 504 is ____ |

1225 and 1280 is ____ | 350 and 2352 is ____ | 210 and 480 is ____ | 54 and 216 is ____ | 735 and 504 is ____ |

140 and 252 is ____ | 126 and 735 is ____ | 315 and 525 is ____ | 225 and 756 is ____ | 60 and 800 is ____ |

315 and 1680 is ____ | 84 and 1440 is ____ | 315 and 392 is ____ | 490 and 1008 is ____ | 140 and 1008 is ____ |

150 and 240 is ____ | 350 and 180 is ____ | 210 and 784 is ____ | 36 and 2016 is ____ | 210 and 1440 is ____ |

441 and 112 is ____ | 875 and 1008 is ____ | 875 and 270 is ____ | 441 and 256 is ____ | 525 and 288 is ____ |

294 and 288 is ____ | 84 and 1050 is ____ | 60 and 864 is ____ | 441 and 560 is ____ | 90 and 630 is ____ |

250 and 980 is ____ | 1029 and 882 is ____ | 250 and 441 is ____ | 196 and 840 is ____ | 525 and 384 is ____ |

126 and 360 is ____ | 140 and 216 is ____ | 40 and 800 is ____ | 1225 and 150 is ____ | 90 and 36 is ____ |

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