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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: | ||||

980 and 3430 is ____ | 980 and 784 is ____ | 2940 and 3675 is ____ | 750 and 1050 is ____ | 1080 and 810 is ____ |

420 and 300 is ____ | 378 and 1008 is ____ | 420 and 560 is ____ | 700 and 1750 is ____ | 480 and 360 is ____ |

3087 and 3528 is ____ | 756 and 504 is ____ | 378 and 108 is ____ | 810 and 540 is ____ | 13720 and 5145 is ____ |

1050 and 630 is ____ | 1323 and 378 is ____ | 1200 and 450 is ____ | 1764 and 882 is ____ | 160 and 120 is ____ |

810 and 630 is ____ | 4410 and 5880 is ____ | 1000 and 1500 is ____ | 1960 and 4410 is ____ | 144 and 48 is ____ |

1050 and 700 is ____ | 1890 and 630 is ____ | 120 and 200 is ____ | 1800 and 900 is ____ | 216 and 108 is ____ |

700 and 500 is ____ | 1575 and 450 is ____ | 882 and 1764 is ____ | 1890 and 1470 is ____ | 672 and 336 is ____ |

3087 and 2646 is ____ | 2940 and 4410 is ____ | 750 and 1200 is ____ | 700 and 420 is ____ | 5880 and 4410 is ____ |

1372 and 3430 is ____ | 588 and 336 is ____ | 1680 and 1470 is ____ | 540 and 300 is ____ | 2744 and 1372 is ____ |

336 and 756 is ____ | 1250 and 1500 is ____ | 180 and 252 is ____ | 168 and 112 is ____ | 588 and 504 is ____ |

1568 and 1372 is ____ | 504 and 630 is ____ | 1260 and 1050 is ____ | 360 and 630 is ____ | 180 and 144 is ____ |

200 and 360 is ____ | 1750 and 1400 is ____ | 600 and 1050 is ____ | 168 and 216 is ____ | 2250 and 1500 is ____ |

180 and 270 is ____ | 980 and 392 is ____ | 2625 and 1125 is ____ | 450 and 360 is ____ | 420 and 480 is ____ |

420 and 300 is ____ | 144 and 48 is ____ | 630 and 882 is ____ | 1250 and 2000 is ____ | 1701 and 567 is ____ |

392 and 504 is ____ | 252 and 588 is ____ | 1500 and 1250 is ____ | 6174 and 2058 is ____ | 3675 and 5880 is ____ |

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

210 and 3072 is ____ | 60 and 1512 is ____ | 315 and 1200 is ____ | 225 and 980 is ____ | 294 and 504 is ____ |

210 and 350 is ____ | 210 and 320 is ____ | 525 and 288 is ____ | 60 and 336 is ____ | 1225 and 384 is ____ |

140 and 1536 is ____ | 1225 and 432 is ____ | 100 and 300 is ____ | 350 and 360 is ____ | 686 and 560 is ____ |

294 and 60 is ____ | 875 and 240 is ____ | 686 and 192 is ____ | 350 and 1680 is ____ | 210 and 336 is ____ |

210 and 490 is ____ | 140 and 360 is ____ | 225 and 1960 is ____ | 735 and 432 is ____ | 315 and 210 is ____ |

525 and 1176 is ____ | 525 and 60 is ____ | 250 and 72 is ____ | 294 and 280 is ____ | 250 and 240 is ____ |

210 and 504 is ____ | 36 and 896 is ____ | 1225 and 1715 is ____ | 36 and 588 is ____ | 210 and 384 is ____ |

294 and 3072 is ____ | 126 and 540 is ____ | 625 and 225 is ____ | 90 and 840 is ____ | 210 and 64 is ____ |

686 and 1400 is ____ | 210 and 504 is ____ | 36 and 294 is ____ | 24 and 1000 is ____ | 1225 and 2352 is ____ |

150 and 384 is ____ | 210 and 270 is ____ | 140 and 630 is ____ | 1715 and 280 is ____ | 315 and 1536 is ____ |

210 and 672 is ____ | 196 and 192 is ____ | 100 and 216 is ____ | 375 and 360 is ____ | 875 and 80 is ____ |

60 and 480 is ____ | 294 and 504 is ____ | 1029 and 720 is ____ | 90 and 300 is ____ | 60 and 252 is ____ |

250 and 672 is ____ | 350 and 756 is ____ | 875 and 1120 is ____ | 100 and 1344 is ____ | 315 and 160 is ____ |

210 and 840 is ____ | 54 and 2744 is ____ | 210 and 144 is ____ | 150 and 1715 is ____ | 225 and 180 is ____ |

294 and 100 is ____ | 140 and 288 is ____ | 250 and 1152 is ____ | 210 and 1120 is ____ | 150 and 96 is ____ |

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