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Worksheet 4 - The Highest Common Factor (HCF) and the Lowest Common Multiple (LCM)  (Difficulty level: Very Hard)
The Highest Common Factor (H.C.F.) of:
588 and 2058 is ____ 630 and 378 is ____ 7350 and 4900 is ____ 504 and 378 is ____ 840 and 1260 is ____
700 and 600 is ____ 378 and 252 is ____ 630 and 180 is ____ 180 and 480 is ____ 1008 and 630 is ____
6125 and 3675 is ____ 1470 and 1890 is ____ 480 and 120 is ____ 1500 and 2250 is ____ 1890 and 420 is ____
1890 and 1260 is ____ 1050 and 1890 is ____ 280 and 980 is ____ 6615 and 2205 is ____ 168 and 588 is ____
980 and 784 is ____ 2625 and 6125 is ____ 252 and 672 is ____ 180 and 120 is ____ 2058 and 1470 is ____
4725 and 4200 is ____ 810 and 720 is ____ 2450 and 3430 is ____ 540 and 360 is ____ 3087 and 9261 is ____
700 and 2800 is ____ 700 and 560 is ____ 3969 and 2646 is ____ 1134 and 378 is ____ 378 and 324 is ____
756 and 504 is ____ 4725 and 3150 is ____ 1350 and 450 is ____ 588 and 1764 is ____ 2940 and 2450 is ____
4410 and 3920 is ____ 1575 and 1050 is ____ 2352 and 1764 is ____ 6125 and 4375 is ____ 168 and 72 is ____
3430 and 1372 is ____ 420 and 630 is ____ 2205 and 5880 is ____ 800 and 700 is ____ 336 and 672 is ____
588 and 504 is ____ 405 and 648 is ____ 72 and 216 is ____ 6174 and 2744 is ____ 8575 and 3675 is ____
1680 and 630 is ____ 162 and 108 is ____ 7203 and 6174 is ____ 1470 and 6615 is ____ 1350 and 1050 is ____
144 and 48 is ____ 360 and 180 is ____ 1120 and 280 is ____ 1470 and 980 is ____ 3675 and 9800 is ____
48 and 72 is ____ 1260 and 1050 is ____ 162 and 486 is ____ 270 and 216 is ____ 784 and 588 is ____
3920 and 980 is ____ 1350 and 300 is ____ 1764 and 2058 is ____ 4375 and 3500 is ____ 3087 and 9261 is ____
The Lowest Common Multiple (L.C.M.) of:
150 and 72 is ____ 56 and 630 is ____ 140 and 960 is ____ 441 and 1008 is ____ 40 and 210 is ____
375 and 1344 is ____ 294 and 256 is ____ 84 and 600 is ____ 100 and 800 is ____ 90 and 490 is ____
315 and 144 is ____ 60 and 1792 is ____ 56 and 2240 is ____ 210 and 672 is ____ 225 and 252 is ____
225 and 144 is ____ 490 and 504 is ____ 135 and 2352 is ____ 315 and 768 is ____ 150 and 280 is ____
36 and 1400 is ____ 315 and 288 is ____ 56 and 252 is ____ 490 and 768 is ____ 210 and 560 is ____
210 and 240 is ____ 1715 and 350 is ____ 196 and 108 is ____ 315 and 2352 is ____ 90 and 784 is ____
210 and 300 is ____ 1225 and 1008 is ____ 210 and 720 is ____ 150 and 240 is ____ 210 and 216 is ____
60 and 1050 is ____ 250 and 210 is ____ 150 and 420 is ____ 140 and 392 is ____ 126 and 120 is ____
40 and 400 is ____ 490 and 784 is ____ 350 and 256 is ____ 210 and 980 is ____ 54 and 294 is ____
196 and 144 is ____ 294 and 288 is ____ 875 and 1680 is ____ 90 and 1680 is ____ 135 and 288 is ____
225 and 240 is ____ 210 and 336 is ____ 315 and 192 is ____ 126 and 224 is ____ 1029 and 240 is ____
735 and 150 is ____ 735 and 875 is ____ 210 and 672 is ____ 350 and 144 is ____ 60 and 600 is ____
84 and 720 is ____ 225 and 200 is ____ 210 and 1152 is ____ 225 and 450 is ____ 225 and 300 is ____
210 and 441 is ____ 1029 and 432 is ____ 56 and 560 is ____ 126 and 1008 is ____ 441 and 144 is ____
735 and 320 is ____ 210 and 120 is ____ 90 and 600 is ____ 90 and 960 is ____ 126 and 336 is ____

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