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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:
300 and 540 is ____ 3675 and 2450 is ____ 945 and 756 is ____ 5880 and 6615 is ____ 1470 and 1890 is ____
504 and 168 is ____ 630 and 378 is ____ 180 and 270 is ____ 2000 and 2250 is ____ 700 and 560 is ____
840 and 1260 is ____ 420 and 252 is ____ 1134 and 630 is ____ 882 and 3087 is ____ 1960 and 1764 is ____
1680 and 840 is ____ 5880 and 1470 is ____ 32 and 128 is ____ 4116 and 2058 is ____ 1372 and 1764 is ____
480 and 420 is ____ 108 and 180 is ____ 630 and 1050 is ____ 80 and 64 is ____ 180 and 480 is ____
1764 and 2205 is ____ 672 and 588 is ____ 1470 and 2205 is ____ 6174 and 5488 is ____ 2625 and 1050 is ____
1134 and 1323 is ____ 480 and 240 is ____ 2835 and 1575 is ____ 750 and 600 is ____ 2205 and 1470 is ____
1890 and 945 is ____ 1890 and 840 is ____ 1575 and 4200 is ____ 2940 and 5880 is ____ 4116 and 2058 is ____
840 and 700 is ____ 10290 and 9261 is ____ 5880 and 2205 is ____ 588 and 392 is ____ 560 and 420 is ____
3750 and 3125 is ____ 900 and 1125 is ____ 360 and 540 is ____ 750 and 1050 is ____ 432 and 486 is ____
2205 and 1470 is ____ 2940 and 1470 is ____ 1400 and 2450 is ____ 2940 and 2205 is ____ 2520 and 2205 is ____
540 and 720 is ____ 1680 and 1890 is ____ 336 and 252 is ____ 252 and 420 is ____ 160 and 360 is ____
2450 and 3920 is ____ 2520 and 630 is ____ 1125 and 2025 is ____ 1470 and 1764 is ____ 700 and 560 is ____
6174 and 1372 is ____ 2450 and 3430 is ____ 630 and 1890 is ____ 450 and 1350 is ____ 180 and 420 is ____
810 and 675 is ____ 1500 and 2000 is ____ 540 and 720 is ____ 1470 and 1260 is ____ 168 and 672 is ____
The Lowest Common Multiple (L.C.M.) of:
294 and 784 is ____ 150 and 640 is ____ 196 and 560 is ____ 490 and 672 is ____ 60 and 288 is ____
735 and 240 is ____ 84 and 224 is ____ 490 and 384 is ____ 150 and 1120 is ____ 350 and 81 is ____
350 and 960 is ____ 126 and 288 is ____ 60 and 240 is ____ 350 and 324 is ____ 2401 and 294 is ____
126 and 504 is ____ 84 and 1280 is ____ 210 and 126 is ____ 490 and 128 is ____ 140 and 360 is ____
350 and 600 is ____ 24 and 588 is ____ 140 and 224 is ____ 56 and 882 is ____ 225 and 2058 is ____
294 and 360 is ____ 90 and 1152 is ____ 150 and 320 is ____ 525 and 768 is ____ 315 and 480 is ____
350 and 256 is ____ 150 and 600 is ____ 100 and 360 is ____ 1029 and 768 is ____ 875 and 882 is ____
735 and 480 is ____ 84 and 120 is ____ 150 and 315 is ____ 525 and 768 is ____ 60 and 224 is ____
441 and 168 is ____ 56 and 126 is ____ 625 and 48 is ____ 36 and 360 is ____ 40 and 126 is ____
735 and 1344 is ____ 189 and 768 is ____ 350 and 600 is ____ 350 and 3136 is ____ 441 and 768 is ____
210 and 180 is ____ 135 and 1000 is ____ 150 and 288 is ____ 250 and 512 is ____ 150 and 840 is ____
315 and 216 is ____ 1029 and 840 is ____ 490 and 420 is ____ 60 and 1344 is ____ 90 and 588 is ____
735 and 360 is ____ 210 and 882 is ____ 294 and 840 is ____ 735 and 192 is ____ 735 and 288 is ____
375 and 180 is ____ 250 and 300 is ____ 210 and 288 is ____ 150 and 672 is ____ 210 and 735 is ____
294 and 112 is ____ 441 and 560 is ____ 54 and 144 is ____ 225 and 192 is ____ 210 and 1080 is ____

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