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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:
1372 and 980 is ____ 567 and 945 is ____ 6615 and 1470 is ____ 560 and 1260 is ____ 360 and 180 is ____
1470 and 420 is ____ 1120 and 560 is ____ 1470 and 4410 is ____ 5145 and 15435 is ____ 945 and 630 is ____
180 and 108 is ____ 1050 and 1890 is ____ 840 and 420 is ____ 1050 and 600 is ____ 1260 and 945 is ____
504 and 168 is ____ 420 and 504 is ____ 720 and 450 is ____ 1680 and 420 is ____ 588 and 756 is ____
4410 and 3920 is ____ 900 and 675 is ____ 672 and 336 is ____ 2800 and 700 is ____ 5145 and 2940 is ____
1800 and 900 is ____ 420 and 480 is ____ 810 and 270 is ____ 4410 and 1470 is ____ 1260 and 1050 is ____
1470 and 2205 is ____ 2205 and 4410 is ____ 1568 and 784 is ____ 1120 and 700 is ____ 700 and 2450 is ____
12005 and 3430 is ____ 504 and 168 is ____ 1680 and 1470 is ____ 3150 and 4200 is ____ 1260 and 1050 is ____
750 and 1200 is ____ 729 and 324 is ____ 2744 and 2058 is ____ 900 and 500 is ____ 2940 and 4410 is ____
2940 and 5145 is ____ 1050 and 3150 is ____ 2352 and 1764 is ____ 1680 and 840 is ____ 882 and 378 is ____
280 and 224 is ____ 2058 and 2744 is ____ 3430 and 3920 is ____ 3087 and 2205 is ____ 400 and 700 is ____
756 and 630 is ____ 675 and 810 is ____ 2058 and 588 is ____ 324 and 270 is ____ 980 and 1372 is ____
8575 and 4900 is ____ 4200 and 2100 is ____ 3920 and 1960 is ____ 540 and 240 is ____ 1260 and 1890 is ____
432 and 378 is ____ 504 and 378 is ____ 945 and 540 is ____ 360 and 270 is ____ 2205 and 1470 is ____
6125 and 3675 is ____ 300 and 1200 is ____ 336 and 280 is ____ 5145 and 4116 is ____ 4410 and 3969 is ____
The Lowest Common Multiple (L.C.M.) of:
150 and 1440 is ____ 140 and 1920 is ____ 189 and 768 is ____ 525 and 336 is ____ 735 and 504 is ____
210 and 216 is ____ 90 and 672 is ____ 225 and 1568 is ____ 225 and 600 is ____ 225 and 672 is ____
210 and 1728 is ____ 490 and 240 is ____ 60 and 576 is ____ 210 and 160 is ____ 135 and 504 is ____
210 and 735 is ____ 210 and 72 is ____ 24 and 420 is ____ 56 and 504 is ____ 1225 and 2016 is ____
210 and 224 is ____ 140 and 360 is ____ 315 and 864 is ____ 225 and 1400 is ____ 350 and 875 is ____
250 and 240 is ____ 525 and 224 is ____ 56 and 450 is ____ 735 and 300 is ____ 250 and 1600 is ____
210 and 250 is ____ 60 and 120 is ____ 350 and 1152 is ____ 140 and 400 is ____ 140 and 432 is ____
100 and 144 is ____ 735 and 576 is ____ 350 and 768 is ____ 24 and 840 is ____ 490 and 672 is ____
135 and 875 is ____ 315 and 448 is ____ 150 and 48 is ____ 100 and 1920 is ____ 1225 and 144 is ____
24 and 420 is ____ 90 and 432 is ____ 210 and 96 is ____ 40 and 200 is ____ 490 and 1400 is ____
875 and 100 is ____ 294 and 784 is ____ 150 and 720 is ____ 90 and 1400 is ____ 315 and 192 is ____
1029 and 576 is ____ 126 and 96 is ____ 315 and 1920 is ____ 294 and 525 is ____ 1715 and 128 is ____
315 and 432 is ____ 525 and 392 is ____ 490 and 252 is ____ 735 and 256 is ____ 294 and 450 is ____
54 and 270 is ____ 150 and 420 is ____ 60 and 360 is ____ 126 and 630 is ____ 84 and 168 is ____
196 and 1008 is ____ 350 and 96 is ____ 315 and 280 is ____ 210 and 840 is ____ 84 and 720 is ____

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