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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:
2352 and 588 is ____ 1750 and 1400 is ____ 504 and 420 is ____ 6125 and 7875 is ____ 2450 and 1470 is ____
5145 and 4410 is ____ 240 and 180 is ____ 448 and 504 is ____ 324 and 288 is ____ 840 and 756 is ____
3675 and 2625 is ____ 336 and 168 is ____ 180 and 480 is ____ 2450 and 1400 is ____ 720 and 630 is ____
3675 and 6125 is ____ 2250 and 750 is ____ 630 and 882 is ____ 3150 and 4200 is ____ 1125 and 1875 is ____
7875 and 7000 is ____ 500 and 750 is ____ 630 and 1890 is ____ 2625 and 4725 is ____ 1323 and 1512 is ____
3430 and 1960 is ____ 500 and 2250 is ____ 2800 and 2450 is ____ 2520 and 2205 is ____ 2520 and 630 is ____
1260 and 420 is ____ 1890 and 1680 is ____ 630 and 360 is ____ 240 and 420 is ____ 1200 and 300 is ____
420 and 1260 is ____ 420 and 980 is ____ 2450 and 1750 is ____ 810 and 405 is ____ 1750 and 1400 is ____
1470 and 5145 is ____ 1176 and 882 is ____ 270 and 180 is ____ 567 and 1134 is ____ 1350 and 900 is ____
1050 and 750 is ____ 420 and 1890 is ____ 2625 and 7875 is ____ 540 and 480 is ____ 200 and 300 is ____
3920 and 2450 is ____ 600 and 1350 is ____ 1470 and 1176 is ____ 3920 and 3430 is ____ 1120 and 1260 is ____
420 and 672 is ____ 588 and 784 is ____ 270 and 450 is ____ 1750 and 1400 is ____ 300 and 600 is ____
1680 and 1470 is ____ 6174 and 3430 is ____ 1890 and 840 is ____ 600 and 500 is ____ 3150 and 2100 is ____
882 and 1764 is ____ 450 and 750 is ____ 192 and 72 is ____ 2352 and 2646 is ____ 1125 and 450 is ____
3150 and 4200 is ____ 6615 and 5880 is ____ 280 and 1120 is ____ 1125 and 2250 is ____ 360 and 480 is ____
The Lowest Common Multiple (L.C.M.) of:
90 and 180 is ____ 40 and 300 is ____ 525 and 896 is ____ 1029 and 216 is ____ 350 and 140 is ____
490 and 1176 is ____ 54 and 1568 is ____ 490 and 192 is ____ 210 and 224 is ____ 84 and 108 is ____
350 and 300 is ____ 2940 and 735 is ____ 150 and 240 is ____ 210 and 2016 is ____ 36 and 480 is ____
90 and 1680 is ____ 24 and 882 is ____ 210 and 480 is ____ 56 and 168 is ____ 294 and 560 is ____
294 and 336 is ____ 210 and 1680 is ____ 210 and 840 is ____ 441 and 56 is ____ 210 and 1680 is ____
150 and 432 is ____ 100 and 60 is ____ 1029 and 588 is ____ 100 and 1920 is ____ 350 and 168 is ____
735 and 720 is ____ 1029 and 896 is ____ 90 and 525 is ____ 210 and 240 is ____ 525 and 448 is ____
135 and 720 is ____ 90 and 3584 is ____ 315 and 2016 is ____ 294 and 360 is ____ 735 and 150 is ____
441 and 288 is ____ 250 and 448 is ____ 126 and 180 is ____ 100 and 1440 is ____ 315 and 756 is ____
150 and 1680 is ____ 150 and 448 is ____ 210 and 400 is ____ 60 and 672 is ____ 189 and 1372 is ____
490 and 192 is ____ 150 and 72 is ____ 210 and 180 is ____ 350 and 288 is ____ 315 and 126 is ____
60 and 336 is ____ 490 and 180 is ____ 441 and 480 is ____ 735 and 1260 is ____ 315 and 108 is ____
150 and 630 is ____ 126 and 280 is ____ 135 and 448 is ____ 56 and 1120 is ____ 150 and 280 is ____
735 and 900 is ____ 140 and 400 is ____ 56 and 896 is ____ 90 and 576 is ____ 90 and 378 is ____
735 and 1470 is ____ 100 and 1344 is ____ 90 and 882 is ____ 140 and 960 is ____ 375 and 392 is ____

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