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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:
180 and 480 is ____ 1050 and 1350 is ____ 48 and 96 is ____ 1372 and 1568 is ____ 588 and 252 is ____
3675 and 2625 is ____ 1575 and 1260 is ____ 504 and 112 is ____ 588 and 1568 is ____ 2352 and 1764 is ____
5880 and 5145 is ____ 6860 and 5145 is ____ 1470 and 2940 is ____ 5145 and 13720 is ____ 120 and 420 is ____
4410 and 2940 is ____ 4900 and 4410 is ____ 980 and 280 is ____ 1125 and 900 is ____ 1890 and 840 is ____
1260 and 630 is ____ 630 and 1260 is ____ 3920 and 1470 is ____ 1080 and 405 is ____ 3150 and 1750 is ____
450 and 900 is ____ 252 and 672 is ____ 2800 and 3150 is ____ 2205 and 3528 is ____ 450 and 360 is ____
6615 and 5145 is ____ 9261 and 3087 is ____ 6860 and 3430 is ____ 2205 and 1470 is ____ 2450 and 1960 is ____
1134 and 1323 is ____ 2450 and 1050 is ____ 700 and 560 is ____ 5625 and 1875 is ____ 2625 and 4725 is ____
3675 and 1470 is ____ 1470 and 3430 is ____ 945 and 810 is ____ 900 and 600 is ____ 120 and 200 is ____
3675 and 3150 is ____ 720 and 630 is ____ 2625 and 4725 is ____ 120 and 200 is ____ 900 and 300 is ____
2205 and 2520 is ____ 2646 and 1470 is ____ 504 and 420 is ____ 11025 and 4900 is ____ 980 and 4410 is ____
1400 and 2450 is ____ 240 and 120 is ____ 810 and 1215 is ____ 1176 and 588 is ____ 13720 and 5145 is ____
2250 and 750 is ____ 1400 and 1260 is ____ 945 and 630 is ____ 180 and 540 is ____ 7000 and 7875 is ____
1764 and 882 is ____ 1890 and 1575 is ____ 504 and 882 is ____ 324 and 216 is ____ 5145 and 2205 is ____
336 and 252 is ____ 3675 and 4410 is ____ 540 and 270 is ____ 360 and 80 is ____ 756 and 1008 is ____
The Lowest Common Multiple (L.C.M.) of:
126 and 882 is ____ 875 and 168 is ____ 225 and 72 is ____ 490 and 1792 is ____ 315 and 480 is ____
490 and 240 is ____ 135 and 392 is ____ 150 and 252 is ____ 250 and 252 is ____ 84 and 504 is ____
150 and 1024 is ____ 686 and 960 is ____ 525 and 120 is ____ 735 and 336 is ____ 1225 and 432 is ____
196 and 56 is ____ 100 and 1680 is ____ 625 and 96 is ____ 350 and 980 is ____ 210 and 432 is ____
60 and 840 is ____ 140 and 1400 is ____ 140 and 192 is ____ 210 and 224 is ____ 525 and 1200 is ____
126 and 800 is ____ 196 and 1470 is ____ 490 and 420 is ____ 490 and 1440 is ____ 2401 and 1260 is ____
150 and 900 is ____ 126 and 1120 is ____ 735 and 490 is ____ 36 and 300 is ____ 90 and 735 is ____
150 and 384 is ____ 250 and 144 is ____ 250 and 180 is ____ 350 and 400 is ____ 90 and 320 is ____
135 and 2352 is ____ 210 and 1344 is ____ 350 and 1008 is ____ 490 and 960 is ____ 60 and 1152 is ____
90 and 320 is ____ 196 and 384 is ____ 100 and 480 is ____ 84 and 588 is ____ 140 and 560 is ____
315 and 60 is ____ 84 and 120 is ____ 140 and 1920 is ____ 16 and 1960 is ____ 294 and 112 is ____
84 and 560 is ____ 56 and 3136 is ____ 490 and 1280 is ____ 1225 and 64 is ____ 196 and 882 is ____
525 and 1008 is ____ 56 and 720 is ____ 625 and 126 is ____ 24 and 512 is ____ 525 and 224 is ____
24 and 1792 is ____ 126 and 168 is ____ 140 and 576 is ____ 126 and 160 is ____ 140 and 896 is ____
56 and 1024 is ____ 56 and 672 is ____ 525 and 1008 is ____ 84 and 192 is ____ 315 and 768 is ____

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