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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: | ||||

1372 and 980 is ____ | 567 and 945 is ____ | 6615 and 1470 is ____ | 560 and 1260 is ____ | 360 and 180 is ____ |

1470 and 420 is ____ | 1120 and 560 is ____ | 1470 and 4410 is ____ | 5145 and 15435 is ____ | 945 and 630 is ____ |

180 and 108 is ____ | 1050 and 1890 is ____ | 840 and 420 is ____ | 1050 and 600 is ____ | 1260 and 945 is ____ |

504 and 168 is ____ | 420 and 504 is ____ | 720 and 450 is ____ | 1680 and 420 is ____ | 588 and 756 is ____ |

4410 and 3920 is ____ | 900 and 675 is ____ | 672 and 336 is ____ | 2800 and 700 is ____ | 5145 and 2940 is ____ |

1800 and 900 is ____ | 420 and 480 is ____ | 810 and 270 is ____ | 4410 and 1470 is ____ | 1260 and 1050 is ____ |

1470 and 2205 is ____ | 2205 and 4410 is ____ | 1568 and 784 is ____ | 1120 and 700 is ____ | 700 and 2450 is ____ |

12005 and 3430 is ____ | 504 and 168 is ____ | 1680 and 1470 is ____ | 3150 and 4200 is ____ | 1260 and 1050 is ____ |

750 and 1200 is ____ | 729 and 324 is ____ | 2744 and 2058 is ____ | 900 and 500 is ____ | 2940 and 4410 is ____ |

2940 and 5145 is ____ | 1050 and 3150 is ____ | 2352 and 1764 is ____ | 1680 and 840 is ____ | 882 and 378 is ____ |

280 and 224 is ____ | 2058 and 2744 is ____ | 3430 and 3920 is ____ | 3087 and 2205 is ____ | 400 and 700 is ____ |

756 and 630 is ____ | 675 and 810 is ____ | 2058 and 588 is ____ | 324 and 270 is ____ | 980 and 1372 is ____ |

8575 and 4900 is ____ | 4200 and 2100 is ____ | 3920 and 1960 is ____ | 540 and 240 is ____ | 1260 and 1890 is ____ |

432 and 378 is ____ | 504 and 378 is ____ | 945 and 540 is ____ | 360 and 270 is ____ | 2205 and 1470 is ____ |

6125 and 3675 is ____ | 300 and 1200 is ____ | 336 and 280 is ____ | 5145 and 4116 is ____ | 4410 and 3969 is ____ |

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

150 and 1440 is ____ | 140 and 1920 is ____ | 189 and 768 is ____ | 525 and 336 is ____ | 735 and 504 is ____ |

210 and 216 is ____ | 90 and 672 is ____ | 225 and 1568 is ____ | 225 and 600 is ____ | 225 and 672 is ____ |

210 and 1728 is ____ | 490 and 240 is ____ | 60 and 576 is ____ | 210 and 160 is ____ | 135 and 504 is ____ |

210 and 735 is ____ | 210 and 72 is ____ | 24 and 420 is ____ | 56 and 504 is ____ | 1225 and 2016 is ____ |

210 and 224 is ____ | 140 and 360 is ____ | 315 and 864 is ____ | 225 and 1400 is ____ | 350 and 875 is ____ |

250 and 240 is ____ | 525 and 224 is ____ | 56 and 450 is ____ | 735 and 300 is ____ | 250 and 1600 is ____ |

210 and 250 is ____ | 60 and 120 is ____ | 350 and 1152 is ____ | 140 and 400 is ____ | 140 and 432 is ____ |

100 and 144 is ____ | 735 and 576 is ____ | 350 and 768 is ____ | 24 and 840 is ____ | 490 and 672 is ____ |

135 and 875 is ____ | 315 and 448 is ____ | 150 and 48 is ____ | 100 and 1920 is ____ | 1225 and 144 is ____ |

24 and 420 is ____ | 90 and 432 is ____ | 210 and 96 is ____ | 40 and 200 is ____ | 490 and 1400 is ____ |

875 and 100 is ____ | 294 and 784 is ____ | 150 and 720 is ____ | 90 and 1400 is ____ | 315 and 192 is ____ |

1029 and 576 is ____ | 126 and 96 is ____ | 315 and 1920 is ____ | 294 and 525 is ____ | 1715 and 128 is ____ |

315 and 432 is ____ | 525 and 392 is ____ | 490 and 252 is ____ | 735 and 256 is ____ | 294 and 450 is ____ |

54 and 270 is ____ | 150 and 420 is ____ | 60 and 360 is ____ | 126 and 630 is ____ | 84 and 168 is ____ |

196 and 1008 is ____ | 350 and 96 is ____ | 315 and 280 is ____ | 210 and 840 is ____ | 84 and 720 is ____ |

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