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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:
3528 and 3087 is ____ 500 and 600 is ____ 840 and 756 is ____ 1764 and 1372 is ____ 980 and 1764 is ____
1080 and 945 is ____ 2058 and 588 is ____ 1568 and 1764 is ____ 588 and 392 is ____ 2940 and 3675 is ____
700 and 1750 is ____ 2646 and 1470 is ____ 1200 and 1050 is ____ 2835 and 1890 is ____ 1470 and 1890 is ____
3430 and 2744 is ____ 180 and 720 is ____ 6174 and 4116 is ____ 1050 and 4200 is ____ 5000 and 2500 is ____
588 and 1764 is ____ 900 and 810 is ____ 360 and 810 is ____ 540 and 720 is ____ 4725 and 1050 is ____
180 and 540 is ____ 945 and 630 is ____ 1680 and 1470 is ____ 1260 and 1050 is ____ 216 and 432 is ____
1260 and 840 is ____ 750 and 3000 is ____ 1050 and 840 is ____ 900 and 450 is ____ 630 and 180 is ____
1470 and 1176 is ____ 2646 and 3969 is ____ 1250 and 1750 is ____ 900 and 810 is ____ 108 and 72 is ____
420 and 1260 is ____ 378 and 630 is ____ 360 and 630 is ____ 1000 and 750 is ____ 2800 and 2450 is ____
567 and 378 is ____ 1000 and 1500 is ____ 240 and 360 is ____ 3675 and 2940 is ____ 1575 and 3150 is ____
2646 and 2205 is ____ 588 and 1764 is ____ 2835 and 2205 is ____ 10290 and 5145 is ____ 3000 and 3375 is ____
180 and 108 is ____ 3430 and 1470 is ____ 1050 and 4725 is ____ 5145 and 3430 is ____ 1890 and 2205 is ____
756 and 882 is ____ 900 and 1800 is ____ 2646 and 2205 is ____ 21609 and 4802 is ____ 360 and 240 is ____
2625 and 4200 is ____ 630 and 1890 is ____ 784 and 1372 is ____ 2940 and 4410 is ____ 450 and 360 is ____
2450 and 4410 is ____ 4375 and 7875 is ____ 1260 and 630 is ____ 1890 and 1575 is ____ 1750 and 1050 is ____
The Lowest Common Multiple (L.C.M.) of:
735 and 960 is ____ 210 and 720 is ____ 350 and 270 is ____ 196 and 1008 is ____ 90 and 768 is ____
1225 and 480 is ____ 100 and 240 is ____ 1029 and 288 is ____ 875 and 600 is ____ 126 and 432 is ____
140 and 2048 is ____ 84 and 720 is ____ 84 and 360 is ____ 294 and 420 is ____ 140 and 384 is ____
525 and 864 is ____ 294 and 1536 is ____ 210 and 512 is ____ 441 and 420 is ____ 875 and 2560 is ____
126 and 1000 is ____ 350 and 252 is ____ 36 and 1792 is ____ 686 and 360 is ____ 210 and 720 is ____
196 and 144 is ____ 60 and 504 is ____ 735 and 288 is ____ 2401 and 168 is ____ 525 and 126 is ____
81 and 576 is ____ 150 and 640 is ____ 1029 and 1680 is ____ 1029 and 24 is ____ 54 and 576 is ____
60 and 1344 is ____ 2401 and 320 is ____ 210 and 96 is ____ 315 and 1024 is ____ 150 and 450 is ____
84 and 120 is ____ 140 and 240 is ____ 36 and 280 is ____ 126 and 210 is ____ 315 and 480 is ____
490 and 630 is ____ 81 and 128 is ____ 315 and 896 is ____ 1715 and 336 is ____ 40 and 80 is ____
525 and 120 is ____ 490 and 720 is ____ 60 and 126 is ____ 210 and 336 is ____ 84 and 750 is ____
686 and 315 is ____ 210 and 360 is ____ 441 and 896 is ____ 294 and 1764 is ____ 315 and 630 is ____
90 and 432 is ____ 315 and 512 is ____ 84 and 192 is ____ 126 and 480 is ____ 294 and 1440 is ____
140 and 288 is ____ 375 and 600 is ____ 210 and 384 is ____ 490 and 672 is ____ 441 and 2352 is ____
735 and 192 is ____ 135 and 96 is ____ 56 and 96 is ____ 735 and 2688 is ____ 16 and 504 is ____

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