Back to Index Print Version    Answers

Select difficulty:  Easy  Medium  Hard  Very Hard 
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:
320 and 280 is ____ 1350 and 1200 is ____ 700 and 400 is ____ 1500 and 2250 is ____ 756 and 252 is ____
560 and 700 is ____ 700 and 1750 is ____ 945 and 1260 is ____ 600 and 540 is ____ 882 and 2058 is ____
1568 and 588 is ____ 252 and 168 is ____ 1575 and 450 is ____ 1050 and 1750 is ____ 1575 and 675 is ____
810 and 675 is ____ 1575 and 1260 is ____ 3920 and 980 is ____ 2250 and 2025 is ____ 3675 and 2940 is ____
1470 and 1960 is ____ 630 and 1575 is ____ 1575 and 1050 is ____ 2450 and 1470 is ____ 504 and 378 is ____
1960 and 1470 is ____ 180 and 720 is ____ 1470 and 2450 is ____ 882 and 630 is ____ 168 and 144 is ____
700 and 980 is ____ 360 and 280 is ____ 1575 and 900 is ____ 840 and 630 is ____ 168 and 112 is ____
1323 and 2646 is ____ 120 and 192 is ____ 420 and 980 is ____ 756 and 567 is ____ 420 and 360 is ____
1890 and 2835 is ____ 1680 and 1470 is ____ 504 and 252 is ____ 1000 and 750 is ____ 1350 and 450 is ____
1200 and 1350 is ____ 336 and 168 is ____ 400 and 500 is ____ 1701 and 1512 is ____ 1050 and 420 is ____
240 and 360 is ____ 675 and 1350 is ____ 1260 and 1470 is ____ 2835 and 945 is ____ 420 and 280 is ____
360 and 300 is ____ 1050 and 1575 is ____ 504 and 378 is ____ 486 and 108 is ____ 180 and 360 is ____
2800 and 700 is ____ 945 and 1512 is ____ 1500 and 1750 is ____ 320 and 360 is ____ 900 and 1125 is ____
1080 and 675 is ____ 420 and 1260 is ____ 270 and 432 is ____ 720 and 180 is ____ 1680 and 1470 is ____
252 and 324 is ____ 1350 and 1125 is ____ 1575 and 4200 is ____ 480 and 420 is ____ 2100 and 3150 is ____
The Lowest Common Multiple (L.C.M.) of:
350 and 192 is ____ 1225 and 1280 is ____ 60 and 560 is ____ 210 and 756 is ____ 735 and 224 is ____
210 and 336 is ____ 294 and 756 is ____ 1225 and 1920 is ____ 294 and 432 is ____ 210 and 360 is ____
126 and 432 is ____ 735 and 180 is ____ 1029 and 1680 is ____ 735 and 450 is ____ 90 and 160 is ____
210 and 280 is ____ 210 and 896 is ____ 150 and 2352 is ____ 90 and 2352 is ____ 490 and 112 is ____
350 and 2688 is ____ 126 and 384 is ____ 490 and 336 is ____ 2401 and 1176 is ____ 60 and 600 is ____
735 and 300 is ____ 294 and 630 is ____ 294 and 160 is ____ 210 and 320 is ____ 294 and 1176 is ____
100 and 1470 is ____ 735 and 270 is ____ 140 and 112 is ____ 100 and 1008 is ____ 60 and 960 is ____
135 and 896 is ____ 126 and 450 is ____ 686 and 144 is ____ 1029 and 420 is ____ 84 and 432 is ____
735 and 1176 is ____ 36 and 432 is ____ 150 and 336 is ____ 140 and 126 is ____ 140 and 1792 is ____
294 and 840 is ____ 375 and 192 is ____ 490 and 1152 is ____ 84 and 72 is ____ 135 and 100 is ____
90 and 400 is ____ 81 and 864 is ____ 225 and 360 is ____ 1225 and 256 is ____ 350 and 224 is ____
1029 and 480 is ____ 40 and 600 is ____ 150 and 480 is ____ 24 and 360 is ____ 135 and 630 is ____
24 and 360 is ____ 84 and 2352 is ____ 210 and 1960 is ____ 686 and 216 is ____ 81 and 72 is ____
54 and 48 is ____ 210 and 384 is ____ 126 and 700 is ____ 350 and 315 is ____ 84 and 420 is ____
126 and 350 is ____ 84 and 3584 is ____ 150 and 375 is ____ 490 and 160 is ____ 225 and 72 is ____

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