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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:
1134 and 945 is ____ 168 and 504 is ____ 5145 and 4410 is ____ 945 and 2205 is ____ 2205 and 2520 is ____
420 and 840 is ____ 784 and 1568 is ____ 4410 and 3675 is ____ 840 and 630 is ____ 420 and 980 is ____
500 and 300 is ____ 300 and 750 is ____ 1470 and 6615 is ____ 840 and 980 is ____ 2625 and 4200 is ____
240 and 540 is ____ 1050 and 2450 is ____ 1134 and 1008 is ____ 600 and 900 is ____ 882 and 756 is ____
980 and 2450 is ____ 450 and 1350 is ____ 3528 and 2646 is ____ 243 and 729 is ____ 168 and 756 is ____
270 and 216 is ____ 480 and 420 is ____ 240 and 180 is ____ 3500 and 2625 is ____ 1764 and 1372 is ____
1890 and 1260 is ____ 2100 and 2450 is ____ 450 and 810 is ____ 840 and 1050 is ____ 3920 and 980 is ____
810 and 720 is ____ 420 and 672 is ____ 4900 and 11025 is ____ 420 and 280 is ____ 756 and 588 is ____
280 and 560 is ____ 120 and 180 is ____ 1350 and 1200 is ____ 300 and 420 is ____ 1008 and 504 is ____
1050 and 1400 is ____ 2450 and 4410 is ____ 630 and 2520 is ____ 1470 and 1680 is ____ 588 and 882 is ____
1260 and 1575 is ____ 810 and 405 is ____ 360 and 420 is ____ 420 and 1680 is ____ 1200 and 1050 is ____
3430 and 4410 is ____ 4410 and 3675 is ____ 120 and 180 is ____ 1008 and 882 is ____ 270 and 540 is ____
1120 and 980 is ____ 630 and 1050 is ____ 900 and 750 is ____ 1050 and 2625 is ____ 64 and 128 is ____
3675 and 5880 is ____ 630 and 540 is ____ 1050 and 1680 is ____ 4410 and 2450 is ____ 1500 and 750 is ____
2646 and 1764 is ____ 840 and 756 is ____ 1890 and 1260 is ____ 1350 and 1125 is ____ 4900 and 9800 is ____
The Lowest Common Multiple (L.C.M.) of:
525 and 960 is ____ 210 and 540 is ____ 375 and 560 is ____ 441 and 384 is ____ 420 and 210 is ____
210 and 420 is ____ 140 and 448 is ____ 210 and 2240 is ____ 210 and 768 is ____ 140 and 288 is ____
90 and 256 is ____ 150 and 144 is ____ 294 and 432 is ____ 150 and 36 is ____ 490 and 672 is ____
315 and 1176 is ____ 294 and 768 is ____ 56 and 280 is ____ 150 and 315 is ____ 100 and 300 is ____
210 and 336 is ____ 350 and 210 is ____ 54 and 288 is ____ 210 and 1920 is ____ 210 and 224 is ____
686 and 864 is ____ 90 and 1120 is ____ 84 and 252 is ____ 60 and 84 is ____ 24 and 420 is ____
126 and 225 is ____ 490 and 300 is ____ 90 and 1008 is ____ 210 and 144 is ____ 189 and 560 is ____
84 and 1344 is ____ 225 and 192 is ____ 126 and 3584 is ____ 735 and 225 is ____ 1715 and 1176 is ____
90 and 480 is ____ 294 and 360 is ____ 315 and 900 is ____ 90 and 800 is ____ 2401 and 420 is ____
84 and 240 is ____ 350 and 672 is ____ 315 and 180 is ____ 210 and 360 is ____ 525 and 768 is ____
1225 and 432 is ____ 1029 and 768 is ____ 490 and 80 is ____ 735 and 392 is ____ 84 and 1176 is ____
84 and 448 is ____ 40 and 180 is ____ 135 and 3072 is ____ 525 and 288 is ____ 84 and 896 is ____
100 and 720 is ____ 189 and 420 is ____ 490 and 300 is ____ 441 and 784 is ____ 315 and 420 is ____
294 and 1120 is ____ 294 and 64 is ____ 100 and 672 is ____ 225 and 672 is ____ 100 and 1176 is ____
210 and 96 is ____ 735 and 216 is ____ 135 and 768 is ____ 84 and 196 is ____ 84 and 144 is ____

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