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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: | ||||

15435 and 10290 is ____ | 280 and 1120 is ____ | 2450 and 1400 is ____ | 1260 and 1680 is ____ | 1250 and 1000 is ____ |

1470 and 980 is ____ | 14406 and 4802 is ____ | 700 and 600 is ____ | 2800 and 2450 is ____ | 1875 and 1250 is ____ |

2940 and 5880 is ____ | 3150 and 4200 is ____ | 108 and 144 is ____ | 750 and 1750 is ____ | 4725 and 4200 is ____ |

945 and 2835 is ____ | 1050 and 300 is ____ | 2100 and 3150 is ____ | 1764 and 588 is ____ | 800 and 700 is ____ |

180 and 240 is ____ | 1750 and 7875 is ____ | 2025 and 1800 is ____ | 720 and 450 is ____ | 1008 and 378 is ____ |

5145 and 6615 is ____ | 840 and 1260 is ____ | 600 and 540 is ____ | 540 and 120 is ____ | 180 and 810 is ____ |

1260 and 420 is ____ | 540 and 180 is ____ | 900 and 810 is ____ | 6125 and 3500 is ____ | 980 and 4410 is ____ |

3675 and 8575 is ____ | 2940 and 5145 is ____ | 1701 and 567 is ____ | 3750 and 3375 is ____ | 1750 and 6125 is ____ |

675 and 945 is ____ | 72 and 144 is ____ | 2205 and 1470 is ____ | 1750 and 1400 is ____ | 1701 and 1512 is ____ |

945 and 2835 is ____ | 108 and 270 is ____ | 756 and 630 is ____ | 1372 and 5488 is ____ | 840 and 980 is ____ |

504 and 420 is ____ | 3087 and 1764 is ____ | 1176 and 588 is ____ | 360 and 240 is ____ | 1750 and 2800 is ____ |

162 and 108 is ____ | 2000 and 1750 is ____ | 1200 and 1350 is ____ | 4410 and 1960 is ____ | 630 and 1260 is ____ |

3528 and 3087 is ____ | 160 and 240 is ____ | 675 and 2025 is ____ | 1575 and 1125 is ____ | 1323 and 2646 is ____ |

882 and 2646 is ____ | 2800 and 1050 is ____ | 1050 and 600 is ____ | 1050 and 600 is ____ | 11025 and 9800 is ____ |

945 and 2520 is ____ | 784 and 588 is ____ | 144 and 168 is ____ | 420 and 672 is ____ | 2205 and 1470 is ____ |

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

225 and 252 is ____ | 210 and 1120 is ____ | 150 and 735 is ____ | 225 and 1008 is ____ | 350 and 180 is ____ |

60 and 576 is ____ | 60 and 1344 is ____ | 225 and 128 is ____ | 24 and 168 is ____ | 1225 and 120 is ____ |

525 and 700 is ____ | 135 and 1568 is ____ | 600 and 150 is ____ | 210 and 294 is ____ | 36 and 432 is ____ |

140 and 250 is ____ | 210 and 288 is ____ | 735 and 1344 is ____ | 24 and 1152 is ____ | 735 and 2058 is ____ |

210 and 540 is ____ | 210 and 448 is ____ | 40 and 1120 is ____ | 441 and 560 is ____ | 294 and 288 is ____ |

315 and 378 is ____ | 625 and 840 is ____ | 490 and 1920 is ____ | 126 and 192 is ____ | 525 and 630 is ____ |

100 and 1280 is ____ | 54 and 120 is ____ | 490 and 448 is ____ | 1029 and 560 is ____ | 135 and 1792 is ____ |

126 and 120 is ____ | 735 and 1008 is ____ | 210 and 400 is ____ | 84 and 700 is ____ | 150 and 108 is ____ |

140 and 288 is ____ | 210 and 336 is ____ | 90 and 768 is ____ | 441 and 288 is ____ | 60 and 120 is ____ |

294 and 600 is ____ | 294 and 896 is ____ | 210 and 784 is ____ | 225 and 2304 is ____ | 60 and 36 is ____ |

150 and 840 is ____ | 225 and 60 is ____ | 140 and 135 is ____ | 250 and 144 is ____ | 140 and 960 is ____ |

350 and 72 is ____ | 100 and 3072 is ____ | 210 and 1400 is ____ | 140 and 200 is ____ | 36 and 180 is ____ |

126 and 288 is ____ | 210 and 392 is ____ | 210 and 36 is ____ | 1029 and 1440 is ____ | 1029 and 1050 is ____ |

250 and 840 is ____ | 350 and 576 is ____ | 140 and 300 is ____ | 84 and 480 is ____ | 54 and 384 is ____ |

60 and 300 is ____ | 294 and 432 is ____ | 441 and 960 is ____ | 350 and 240 is ____ | 294 and 240 is ____ |

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