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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:
5145 and 7203 is ____ 5145 and 4410 is ____ 1470 and 2058 is ____ 72 and 192 is ____ 1120 and 980 is ____
5145 and 2205 is ____ 630 and 540 is ____ 675 and 2025 is ____ 2625 and 4725 is ____ 1260 and 980 is ____
756 and 420 is ____ 4116 and 7203 is ____ 4410 and 1470 is ____ 2205 and 1323 is ____ 560 and 1120 is ____
450 and 810 is ____ 1470 and 2058 is ____ 2800 and 3150 is ____ 420 and 840 is ____ 2800 and 1750 is ____
3430 and 2940 is ____ 1050 and 2100 is ____ 2058 and 3430 is ____ 1200 and 300 is ____ 2450 and 1960 is ____
540 and 720 is ____ 1260 and 1134 is ____ 2205 and 1764 is ____ 168 and 336 is ____ 1764 and 1470 is ____
6615 and 5880 is ____ 1575 and 2025 is ____ 168 and 448 is ____ 4200 and 1575 is ____ 252 and 672 is ____
756 and 168 is ____ 840 and 420 is ____ 336 and 672 is ____ 1400 and 2450 is ____ 3675 and 5145 is ____
5880 and 5145 is ____ 120 and 540 is ____ 2940 and 980 is ____ 945 and 1575 is ____ 2025 and 1800 is ____
360 and 120 is ____ 420 and 120 is ____ 378 and 1323 is ____ 1764 and 2058 is ____ 2352 and 882 is ____
1120 and 560 is ____ 540 and 450 is ____ 1890 and 1575 is ____ 2058 and 9261 is ____ 392 and 1372 is ____
882 and 588 is ____ 2100 and 1750 is ____ 1260 and 1890 is ____ 480 and 420 is ____ 280 and 980 is ____
1764 and 1568 is ____ 5880 and 5145 is ____ 2100 and 1050 is ____ 252 and 1008 is ____ 540 and 270 is ____
120 and 48 is ____ 6125 and 9800 is ____ 15435 and 6860 is ____ 2625 and 4725 is ____ 588 and 672 is ____
360 and 420 is ____ 2800 and 2100 is ____ 588 and 980 is ____ 1008 and 882 is ____ 108 and 72 is ____
The Lowest Common Multiple (L.C.M.) of:
150 and 768 is ____ 250 and 294 is ____ 525 and 672 is ____ 150 and 2240 is ____ 196 and 84 is ____
315 and 90 is ____ 350 and 336 is ____ 315 and 720 is ____ 490 and 320 is ____ 875 and 504 is ____
90 and 896 is ____ 294 and 672 is ____ 525 and 2240 is ____ 196 and 80 is ____ 90 and 1344 is ____
210 and 432 is ____ 90 and 504 is ____ 196 and 392 is ____ 150 and 1152 is ____ 150 and 288 is ____
1225 and 120 is ____ 196 and 112 is ____ 490 and 1176 is ____ 150 and 1280 is ____ 294 and 1680 is ____
210 and 480 is ____ 56 and 192 is ____ 490 and 840 is ____ 40 and 144 is ____ 294 and 1120 is ____
60 and 180 is ____ 315 and 2240 is ____ 525 and 1440 is ____ 1029 and 784 is ____ 189 and 64 is ____
875 and 840 is ____ 24 and 960 is ____ 735 and 768 is ____ 375 and 448 is ____ 315 and 448 is ____
196 and 448 is ____ 135 and 2352 is ____ 126 and 490 is ____ 490 and 216 is ____ 140 and 1792 is ____
90 and 72 is ____ 90 and 384 is ____ 140 and 504 is ____ 24 and 3584 is ____ 126 and 720 is ____
84 and 768 is ____ 189 and 225 is ____ 90 and 448 is ____ 1715 and 128 is ____ 100 and 672 is ____
350 and 288 is ____ 36 and 512 is ____ 252 and 84 is ____ 735 and 240 is ____ 250 and 576 is ____
210 and 960 is ____ 56 and 336 is ____ 225 and 720 is ____ 225 and 144 is ____ 525 and 250 is ____
294 and 112 is ____ 210 and 1176 is ____ 126 and 1680 is ____ 84 and 900 is ____ 150 and 280 is ____
100 and 800 is ____ 54 and 1280 is ____ 140 and 2352 is ____ 490 and 1152 is ____ 36 and 160 is ____

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