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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: | ||||

5145 and 7203 is ____ | 5145 and 4410 is ____ | 1470 and 2058 is ____ | 72 and 192 is ____ | 1120 and 980 is ____ |

5145 and 2205 is ____ | 630 and 540 is ____ | 675 and 2025 is ____ | 2625 and 4725 is ____ | 1260 and 980 is ____ |

756 and 420 is ____ | 4116 and 7203 is ____ | 4410 and 1470 is ____ | 2205 and 1323 is ____ | 560 and 1120 is ____ |

450 and 810 is ____ | 1470 and 2058 is ____ | 2800 and 3150 is ____ | 420 and 840 is ____ | 2800 and 1750 is ____ |

3430 and 2940 is ____ | 1050 and 2100 is ____ | 2058 and 3430 is ____ | 1200 and 300 is ____ | 2450 and 1960 is ____ |

540 and 720 is ____ | 1260 and 1134 is ____ | 2205 and 1764 is ____ | 168 and 336 is ____ | 1764 and 1470 is ____ |

6615 and 5880 is ____ | 1575 and 2025 is ____ | 168 and 448 is ____ | 4200 and 1575 is ____ | 252 and 672 is ____ |

756 and 168 is ____ | 840 and 420 is ____ | 336 and 672 is ____ | 1400 and 2450 is ____ | 3675 and 5145 is ____ |

5880 and 5145 is ____ | 120 and 540 is ____ | 2940 and 980 is ____ | 945 and 1575 is ____ | 2025 and 1800 is ____ |

360 and 120 is ____ | 420 and 120 is ____ | 378 and 1323 is ____ | 1764 and 2058 is ____ | 2352 and 882 is ____ |

1120 and 560 is ____ | 540 and 450 is ____ | 1890 and 1575 is ____ | 2058 and 9261 is ____ | 392 and 1372 is ____ |

882 and 588 is ____ | 2100 and 1750 is ____ | 1260 and 1890 is ____ | 480 and 420 is ____ | 280 and 980 is ____ |

1764 and 1568 is ____ | 5880 and 5145 is ____ | 2100 and 1050 is ____ | 252 and 1008 is ____ | 540 and 270 is ____ |

120 and 48 is ____ | 6125 and 9800 is ____ | 15435 and 6860 is ____ | 2625 and 4725 is ____ | 588 and 672 is ____ |

360 and 420 is ____ | 2800 and 2100 is ____ | 588 and 980 is ____ | 1008 and 882 is ____ | 108 and 72 is ____ |

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

150 and 768 is ____ | 250 and 294 is ____ | 525 and 672 is ____ | 150 and 2240 is ____ | 196 and 84 is ____ |

315 and 90 is ____ | 350 and 336 is ____ | 315 and 720 is ____ | 490 and 320 is ____ | 875 and 504 is ____ |

90 and 896 is ____ | 294 and 672 is ____ | 525 and 2240 is ____ | 196 and 80 is ____ | 90 and 1344 is ____ |

210 and 432 is ____ | 90 and 504 is ____ | 196 and 392 is ____ | 150 and 1152 is ____ | 150 and 288 is ____ |

1225 and 120 is ____ | 196 and 112 is ____ | 490 and 1176 is ____ | 150 and 1280 is ____ | 294 and 1680 is ____ |

210 and 480 is ____ | 56 and 192 is ____ | 490 and 840 is ____ | 40 and 144 is ____ | 294 and 1120 is ____ |

60 and 180 is ____ | 315 and 2240 is ____ | 525 and 1440 is ____ | 1029 and 784 is ____ | 189 and 64 is ____ |

875 and 840 is ____ | 24 and 960 is ____ | 735 and 768 is ____ | 375 and 448 is ____ | 315 and 448 is ____ |

196 and 448 is ____ | 135 and 2352 is ____ | 126 and 490 is ____ | 490 and 216 is ____ | 140 and 1792 is ____ |

90 and 72 is ____ | 90 and 384 is ____ | 140 and 504 is ____ | 24 and 3584 is ____ | 126 and 720 is ____ |

84 and 768 is ____ | 189 and 225 is ____ | 90 and 448 is ____ | 1715 and 128 is ____ | 100 and 672 is ____ |

350 and 288 is ____ | 36 and 512 is ____ | 252 and 84 is ____ | 735 and 240 is ____ | 250 and 576 is ____ |

210 and 960 is ____ | 56 and 336 is ____ | 225 and 720 is ____ | 225 and 144 is ____ | 525 and 250 is ____ |

294 and 112 is ____ | 210 and 1176 is ____ | 126 and 1680 is ____ | 84 and 900 is ____ | 150 and 280 is ____ |

100 and 800 is ____ | 54 and 1280 is ____ | 140 and 2352 is ____ | 490 and 1152 is ____ | 36 and 160 is ____ |

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