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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: | ||||

5250 and 7000 is ____ | 1260 and 280 is ____ | 2450 and 3920 is ____ | 3150 and 2100 is ____ | 4375 and 6125 is ____ |

630 and 504 is ____ | 1890 and 2835 is ____ | 420 and 1050 is ____ | 480 and 180 is ____ | 840 and 1260 is ____ |

756 and 1008 is ____ | 2646 and 2205 is ____ | 2450 and 3920 is ____ | 1260 and 1050 is ____ | 560 and 280 is ____ |

1215 and 810 is ____ | 2800 and 3150 is ____ | 120 and 96 is ____ | 243 and 567 is ____ | 1701 and 1323 is ____ |

4410 and 3675 is ____ | 630 and 1050 is ____ | 1750 and 3150 is ____ | 2520 and 1575 is ____ | 4410 and 5880 is ____ |

336 and 252 is ____ | 1008 and 630 is ____ | 2450 and 3920 is ____ | 1050 and 600 is ____ | 392 and 168 is ____ |

540 and 300 is ____ | 420 and 1050 is ____ | 630 and 252 is ____ | 1260 and 1470 is ____ | 7350 and 6125 is ____ |

3430 and 2450 is ____ | 96 and 144 is ____ | 72 and 144 is ____ | 3675 and 3150 is ____ | 900 and 400 is ____ |

1250 and 2000 is ____ | 252 and 324 is ____ | 1323 and 1764 is ____ | 1575 and 2025 is ____ | 600 and 750 is ____ |

48 and 120 is ____ | 448 and 392 is ____ | 1575 and 630 is ____ | 5145 and 3087 is ____ | 3500 and 2625 is ____ |

448 and 392 is ____ | 3087 and 8232 is ____ | 1260 and 840 is ____ | 1890 and 420 is ____ | 300 and 750 is ____ |

2450 and 980 is ____ | 4200 and 2100 is ____ | 3675 and 2100 is ____ | 1680 and 840 is ____ | 1680 and 630 is ____ |

8575 and 4900 is ____ | 700 and 1120 is ____ | 900 and 450 is ____ | 320 and 240 is ____ | 360 and 810 is ____ |

2625 and 7875 is ____ | 4410 and 6615 is ____ | 4116 and 3430 is ____ | 750 and 1050 is ____ | 10290 and 8575 is ____ |

3087 and 2058 is ____ | 240 and 300 is ____ | 1890 and 2205 is ____ | 432 and 486 is ____ | 4725 and 1050 is ____ |

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

525 and 252 is ____ | 490 and 384 is ____ | 135 and 96 is ____ | 490 and 420 is ____ | 36 and 1920 is ____ |

350 and 192 is ____ | 735 and 144 is ____ | 36 and 336 is ____ | 375 and 378 is ____ | 225 and 270 is ____ |

140 and 1225 is ____ | 84 and 640 is ____ | 100 and 420 is ____ | 40 and 1470 is ____ | 490 and 1344 is ____ |

490 and 1536 is ____ | 189 and 315 is ____ | 735 and 294 is ____ | 196 and 288 is ____ | 350 and 84 is ____ |

24 and 504 is ____ | 196 and 1960 is ____ | 150 and 240 is ____ | 140 and 960 is ____ | 189 and 384 is ____ |

36 and 420 is ____ | 84 and 864 is ____ | 60 and 336 is ____ | 525 and 240 is ____ | 140 and 980 is ____ |

36 and 490 is ____ | 525 and 320 is ____ | 84 and 504 is ____ | 525 and 3072 is ____ | 1225 and 324 is ____ |

490 and 80 is ____ | 196 and 96 is ____ | 1225 and 1344 is ____ | 140 and 48 is ____ | 250 and 720 is ____ |

490 and 96 is ____ | 490 and 288 is ____ | 350 and 320 is ____ | 294 and 1568 is ____ | 60 and 144 is ____ |

735 and 960 is ____ | 56 and 384 is ____ | 525 and 960 is ____ | 100 and 1029 is ____ | 315 and 240 is ____ |

735 and 2058 is ____ | 210 and 672 is ____ | 350 and 192 is ____ | 84 and 480 is ____ | 315 and 1680 is ____ |

126 and 2016 is ____ | 150 and 756 is ____ | 189 and 84 is ____ | 525 and 512 is ____ | 490 and 200 is ____ |

84 and 1024 is ____ | 100 and 315 is ____ | 100 and 1200 is ____ | 126 and 1260 is ____ | 350 and 1960 is ____ |

225 and 672 is ____ | 210 and 112 is ____ | 196 and 280 is ____ | 1029 and 336 is ____ | 60 and 686 is ____ |

250 and 336 is ____ | 210 and 900 is ____ | 735 and 2744 is ____ | 1225 and 504 is ____ | 90 and 768 is ____ |

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