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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:
216 and 144 is ____ 420 and 280 is ____ 560 and 1260 is ____ 600 and 1050 is ____ 4116 and 2058 is ____
1470 and 5880 is ____ 4410 and 5880 is ____ 1260 and 840 is ____ 2352 and 882 is ____ 360 and 450 is ____
336 and 280 is ____ 6174 and 2744 is ____ 180 and 420 is ____ 720 and 270 is ____ 2450 and 8575 is ____
162 and 216 is ____ 500 and 400 is ____ 280 and 560 is ____ 400 and 700 is ____ 1200 and 600 is ____
1400 and 1050 is ____ 1200 and 1350 is ____ 2646 and 882 is ____ 1080 and 945 is ____ 1470 and 588 is ____
1050 and 1200 is ____ 2625 and 1500 is ____ 9261 and 6174 is ____ 588 and 504 is ____ 1750 and 1250 is ____
4410 and 2940 is ____ 1050 and 1260 is ____ 7875 and 7000 is ____ 72 and 108 is ____ 882 and 1008 is ____
1050 and 3150 is ____ 224 and 112 is ____ 1260 and 2520 is ____ 1470 and 5145 is ____ 5145 and 4410 is ____
2800 and 700 is ____ 675 and 1125 is ____ 1050 and 1470 is ____ 3087 and 3969 is ____ 270 and 810 is ____
1575 and 450 is ____ 200 and 800 is ____ 4900 and 8575 is ____ 980 and 3430 is ____ 1372 and 588 is ____
700 and 980 is ____ 11025 and 4900 is ____ 1050 and 600 is ____ 378 and 504 is ____ 2000 and 2250 is ____
480 and 300 is ____ 11025 and 2450 is ____ 504 and 420 is ____ 12005 and 3430 is ____ 600 and 1050 is ____
504 and 168 is ____ 300 and 120 is ____ 180 and 120 is ____ 1260 and 1680 is ____ 180 and 120 is ____
1875 and 2625 is ____ 480 and 120 is ____ 1575 and 1260 is ____ 360 and 270 is ____ 48 and 64 is ____
2940 and 2450 is ____ 840 and 1260 is ____ 1050 and 840 is ____ 252 and 504 is ____ 2625 and 1575 is ____
The Lowest Common Multiple (L.C.M.) of:
189 and 1176 is ____ 490 and 432 is ____ 56 and 420 is ____ 1715 and 128 is ____ 210 and 392 is ____
441 and 2058 is ____ 441 and 576 is ____ 315 and 480 is ____ 126 and 252 is ____ 225 and 60 is ____
150 and 288 is ____ 315 and 336 is ____ 210 and 2016 is ____ 225 and 96 is ____ 735 and 126 is ____
210 and 980 is ____ 36 and 336 is ____ 54 and 1715 is ____ 735 and 504 is ____ 1029 and 2304 is ____
60 and 1050 is ____ 525 and 480 is ____ 36 and 1008 is ____ 350 and 896 is ____ 350 and 540 is ____
294 and 224 is ____ 315 and 252 is ____ 441 and 735 is ____ 210 and 288 is ____ 60 and 900 is ____
100 and 864 is ____ 140 and 300 is ____ 735 and 480 is ____ 225 and 384 is ____ 60 and 144 is ____
735 and 250 is ____ 375 and 768 is ____ 56 and 180 is ____ 150 and 700 is ____ 90 and 300 is ____
735 and 504 is ____ 315 and 225 is ____ 350 and 576 is ____ 210 and 480 is ____ 60 and 1440 is ____
350 and 144 is ____ 60 and 240 is ____ 525 and 360 is ____ 735 and 144 is ____ 150 and 600 is ____
126 and 480 is ____ 210 and 1680 is ____ 126 and 96 is ____ 196 and 490 is ____ 189 and 216 is ____
2401 and 1120 is ____ 40 and 672 is ____ 210 and 336 is ____ 225 and 576 is ____ 84 and 288 is ____
1029 and 1470 is ____ 525 and 504 is ____ 1715 and 800 is ____ 140 and 216 is ____ 210 and 1120 is ____
60 and 150 is ____ 84 and 1200 is ____ 210 and 252 is ____ 210 and 180 is ____ 150 and 640 is ____
90 and 360 is ____ 60 and 750 is ____ 735 and 294 is ____ 60 and 588 is ____ 126 and 210 is ____

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