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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: | ||||

1680 and 630 is ____ | 630 and 1134 is ____ | 1400 and 1750 is ____ | 360 and 80 is ____ | 144 and 72 is ____ |

600 and 300 is ____ | 216 and 252 is ____ | 3087 and 1764 is ____ | 675 and 405 is ____ | 2205 and 5145 is ____ |

3150 and 700 is ____ | 2250 and 1000 is ____ | 216 and 180 is ____ | 980 and 840 is ____ | 1575 and 675 is ____ |

252 and 882 is ____ | 810 and 270 is ____ | 1260 and 630 is ____ | 1080 and 405 is ____ | 1764 and 3969 is ____ |

300 and 240 is ____ | 1680 and 630 is ____ | 360 and 120 is ____ | 6615 and 2940 is ____ | 1260 and 420 is ____ |

1050 and 1400 is ____ | 840 and 1120 is ____ | 945 and 2205 is ____ | 720 and 630 is ____ | 1125 and 450 is ____ |

1176 and 1568 is ____ | 9800 and 8575 is ____ | 144 and 108 is ____ | 1960 and 1470 is ____ | 840 and 420 is ____ |

1400 and 3150 is ____ | 729 and 648 is ____ | 2205 and 5880 is ____ | 1764 and 588 is ____ | 1568 and 784 is ____ |

168 and 96 is ____ | 2835 and 945 is ____ | 980 and 1260 is ____ | 48 and 144 is ____ | 700 and 1050 is ____ |

1323 and 3087 is ____ | 240 and 480 is ____ | 2450 and 3920 is ____ | 1575 and 630 is ____ | 2058 and 1176 is ____ |

5000 and 3125 is ____ | 450 and 300 is ____ | 324 and 252 is ____ | 180 and 540 is ____ | 252 and 672 is ____ |

450 and 1800 is ____ | 450 and 750 is ____ | 180 and 810 is ____ | 320 and 80 is ____ | 1568 and 1372 is ____ |

2205 and 6615 is ____ | 2940 and 5880 is ____ | 16807 and 14406 is ____ | 3675 and 5880 is ____ | 1764 and 1568 is ____ |

9800 and 11025 is ____ | 1890 and 630 is ____ | 270 and 324 is ____ | 168 and 756 is ____ | 2450 and 1470 is ____ |

3675 and 4200 is ____ | 8575 and 6860 is ____ | 2100 and 1750 is ____ | 2625 and 3675 is ____ | 3528 and 1323 is ____ |

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

60 and 360 is ____ | 315 and 384 is ____ | 225 and 112 is ____ | 315 and 300 is ____ | 225 and 1568 is ____ |

126 and 150 is ____ | 196 and 672 is ____ | 315 and 630 is ____ | 36 and 882 is ____ | 490 and 1344 is ____ |

315 and 672 is ____ | 140 and 560 is ____ | 36 and 448 is ____ | 90 and 672 is ____ | 140 and 448 is ____ |

525 and 96 is ____ | 140 and 180 is ____ | 84 and 1715 is ____ | 90 and 432 is ____ | 126 and 630 is ____ |

210 and 768 is ____ | 1715 and 900 is ____ | 315 and 2688 is ____ | 525 and 768 is ____ | 100 and 200 is ____ |

84 and 525 is ____ | 150 and 1176 is ____ | 686 and 180 is ____ | 60 and 720 is ____ | 84 and 1764 is ____ |

735 and 120 is ____ | 210 and 1344 is ____ | 150 and 60 is ____ | 210 and 750 is ____ | 625 and 1568 is ____ |

150 and 504 is ____ | 350 and 180 is ____ | 315 and 168 is ____ | 36 and 360 is ____ | 350 and 800 is ____ |

84 and 108 is ____ | 140 and 392 is ____ | 441 and 490 is ____ | 140 and 504 is ____ | 60 and 288 is ____ |

441 and 72 is ____ | 210 and 288 is ____ | 875 and 1200 is ____ | 140 and 400 is ____ | 441 and 108 is ____ |

250 and 80 is ____ | 210 and 630 is ____ | 210 and 224 is ____ | 490 and 256 is ____ | 150 and 1440 is ____ |

126 and 375 is ____ | 1715 and 1152 is ____ | 84 and 252 is ____ | 294 and 192 is ____ | 210 and 720 is ____ |

135 and 1470 is ____ | 189 and 2048 is ____ | 56 and 224 is ____ | 735 and 448 is ____ | 225 and 160 is ____ |

126 and 840 is ____ | 735 and 525 is ____ | 84 and 1050 is ____ | 315 and 336 is ____ | 525 and 288 is ____ |

140 and 768 is ____ | 100 and 120 is ____ | 441 and 80 is ____ | 210 and 588 is ____ | 315 and 60 is ____ |

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