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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: | ||||

1960 and 3430 is ____ | 540 and 675 is ____ | 420 and 300 is ____ | 144 and 96 is ____ | 700 and 300 is ____ |

252 and 168 is ____ | 1134 and 630 is ____ | 2100 and 1750 is ____ | 72 and 168 is ____ | 300 and 480 is ____ |

300 and 240 is ____ | 1680 and 630 is ____ | 560 and 1260 is ____ | 2450 and 2800 is ____ | 1350 and 900 is ____ |

840 and 700 is ____ | 1350 and 1200 is ____ | 180 and 300 is ____ | 420 and 280 is ____ | 672 and 588 is ____ |

1890 and 1470 is ____ | 1890 and 630 is ____ | 1008 and 1134 is ____ | 540 and 450 is ____ | 6615 and 1470 is ____ |

3430 and 1470 is ____ | 980 and 1260 is ____ | 3675 and 4200 is ____ | 450 and 1800 is ____ | 1260 and 1050 is ____ |

168 and 504 is ____ | 3430 and 3920 is ____ | 1176 and 2058 is ____ | 1260 and 700 is ____ | 1350 and 600 is ____ |

900 and 1200 is ____ | 980 and 560 is ____ | 980 and 420 is ____ | 1680 and 420 is ____ | 1250 and 500 is ____ |

3920 and 1470 is ____ | 1750 and 2100 is ____ | 9800 and 11025 is ____ | 288 and 180 is ____ | 378 and 432 is ____ |

216 and 144 is ____ | 1050 and 4200 is ____ | 3675 and 2100 is ____ | 300 and 420 is ____ | 588 and 672 is ____ |

630 and 1470 is ____ | 1470 and 1176 is ____ | 810 and 1080 is ____ | 324 and 432 is ____ | 144 and 72 is ____ |

360 and 240 is ____ | 5145 and 3430 is ____ | 1050 and 1750 is ____ | 630 and 840 is ____ | 1890 and 630 is ____ |

2205 and 5880 is ____ | 1470 and 420 is ____ | 3675 and 2450 is ____ | 700 and 900 is ____ | 3150 and 2800 is ____ |

1764 and 2352 is ____ | 2450 and 8575 is ____ | 2450 and 11025 is ____ | 3675 and 2100 is ____ | 300 and 420 is ____ |

7203 and 9604 is ____ | 2625 and 3000 is ____ | 630 and 1050 is ____ | 4410 and 1470 is ____ | 1764 and 1176 is ____ |

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

735 and 168 is ____ | 350 and 490 is ____ | 126 and 2560 is ____ | 1225 and 1536 is ____ | 350 and 1176 is ____ |

1029 and 294 is ____ | 60 and 189 is ____ | 490 and 336 is ____ | 84 and 1400 is ____ | 54 and 1225 is ____ |

210 and 288 is ____ | 36 and 168 is ____ | 294 and 504 is ____ | 40 and 1372 is ____ | 250 and 630 is ____ |

150 and 441 is ____ | 56 and 189 is ____ | 84 and 144 is ____ | 294 and 252 is ____ | 294 and 210 is ____ |

441 and 1008 is ____ | 210 and 196 is ____ | 250 and 1470 is ____ | 210 and 840 is ____ | 686 and 180 is ____ |

210 and 192 is ____ | 189 and 756 is ____ | 490 and 192 is ____ | 315 and 1152 is ____ | 1715 and 144 is ____ |

441 and 288 is ____ | 140 and 240 is ____ | 56 and 144 is ____ | 81 and 480 is ____ | 350 and 384 is ____ |

294 and 2352 is ____ | 1225 and 2401 is ____ | 196 and 840 is ____ | 126 and 2016 is ____ | 350 and 588 is ____ |

60 and 640 is ____ | 525 and 1176 is ____ | 135 and 324 is ____ | 875 and 600 is ____ | 126 and 216 is ____ |

126 and 336 is ____ | 441 and 360 is ____ | 54 and 1470 is ____ | 294 and 1000 is ____ | 90 and 1680 is ____ |

735 and 216 is ____ | 315 and 140 is ____ | 90 and 1200 is ____ | 36 and 630 is ____ | 150 and 240 is ____ |

875 and 108 is ____ | 60 and 192 is ____ | 189 and 1008 is ____ | 100 and 480 is ____ | 350 and 960 is ____ |

150 and 288 is ____ | 375 and 240 is ____ | 350 and 96 is ____ | 210 and 84 is ____ | 294 and 288 is ____ |

315 and 168 is ____ | 135 and 1260 is ____ | 315 and 375 is ____ | 210 and 1008 is ____ | 90 and 1600 is ____ |

60 and 432 is ____ | 315 and 576 is ____ | 210 and 504 is ____ | 24 and 315 is ____ | 24 and 560 is ____ |

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