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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:
360 and 300 is ____ 1260 and 1120 is ____ 600 and 450 is ____ 810 and 1215 is ____ 112 and 128 is ____
3675 and 6125 is ____ 15435 and 8575 is ____ 120 and 192 is ____ 480 and 420 is ____ 750 and 1200 is ____
3150 and 1050 is ____ 900 and 1350 is ____ 200 and 300 is ____ 450 and 810 is ____ 270 and 540 is ____
756 and 567 is ____ 1680 and 840 is ____ 1260 and 1470 is ____ 3087 and 1323 is ____ 1050 and 420 is ____
1215 and 270 is ____ 1680 and 420 is ____ 1400 and 2100 is ____ 120 and 240 is ____ 168 and 588 is ____
3675 and 2205 is ____ 360 and 450 is ____ 1575 and 2835 is ____ 1750 and 2100 is ____ 5145 and 2205 is ____
2000 and 1750 is ____ 252 and 168 is ____ 700 and 600 is ____ 4410 and 2940 is ____ 630 and 810 is ____
336 and 420 is ____ 840 and 630 is ____ 2450 and 4900 is ____ 2835 and 2520 is ____ 882 and 378 is ____
840 and 1470 is ____ 1050 and 1400 is ____ 3675 and 8575 is ____ 3087 and 2646 is ____ 1470 and 588 is ____
300 and 450 is ____ 1260 and 1680 is ____ 3087 and 2058 is ____ 1470 and 1176 is ____ 1680 and 1470 is ____
567 and 1323 is ____ 1575 and 2025 is ____ 810 and 675 is ____ 11025 and 9800 is ____ 120 and 300 is ____
4410 and 2940 is ____ 3000 and 1875 is ____ 300 and 450 is ____ 588 and 1764 is ____ 882 and 756 is ____
1575 and 1350 is ____ 4410 and 1960 is ____ 3150 and 2800 is ____ 1470 and 1260 is ____ 2058 and 588 is ____
1323 and 3969 is ____ 200 and 160 is ____ 4200 and 2625 is ____ 1176 and 882 is ____ 2520 and 1890 is ____
4200 and 3675 is ____ 840 and 1890 is ____ 1890 and 2835 is ____ 1764 and 1372 is ____ 450 and 1050 is ____
The Lowest Common Multiple (L.C.M.) of:
210 and 336 is ____ 60 and 960 is ____ 90 and 576 is ____ 60 and 144 is ____ 210 and 504 is ____
735 and 384 is ____ 375 and 40 is ____ 90 and 588 is ____ 375 and 378 is ____ 150 and 60 is ____
189 and 630 is ____ 225 and 210 is ____ 140 and 600 is ____ 294 and 504 is ____ 40 and 630 is ____
189 and 420 is ____ 24 and 960 is ____ 210 and 216 is ____ 294 and 288 is ____ 294 and 1008 is ____
84 and 378 is ____ 135 and 1120 is ____ 140 and 192 is ____ 56 and 2401 is ____ 84 and 640 is ____
150 and 270 is ____ 150 and 432 is ____ 60 and 128 is ____ 735 and 900 is ____ 490 and 288 is ____
90 and 32 is ____ 735 and 112 is ____ 135 and 540 is ____ 350 and 1029 is ____ 2401 and 180 is ____
210 and 784 is ____ 24 and 960 is ____ 375 and 320 is ____ 126 and 72 is ____ 1575 and 315 is ____
150 and 135 is ____ 90 and 160 is ____ 210 and 480 is ____ 24 and 840 is ____ 210 and 192 is ____
150 and 144 is ____ 60 and 256 is ____ 150 and 224 is ____ 150 and 300 is ____ 54 and 672 is ____
60 and 750 is ____ 40 and 80 is ____ 189 and 1152 is ____ 100 and 360 is ____ 490 and 756 is ____
100 and 192 is ____ 90 and 720 is ____ 294 and 60 is ____ 490 and 1152 is ____ 189 and 240 is ____
90 and 96 is ____ 150 and 504 is ____ 490 and 300 is ____ 1029 and 360 is ____ 90 and 400 is ____
126 and 504 is ____ 100 and 525 is ____ 875 and 756 is ____ 525 and 300 is ____ 1029 and 280 is ____
140 and 360 is ____ 140 and 360 is ____ 840 and 210 is ____ 140 and 576 is ____ 84 and 320 is ____

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