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# Aptitude - Problems on H.C.F and L.C.M

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### Exercise

• General Questions
"Success has many fathers, while failure is an orphan."
- (Proverb)
21.

The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:

 A. 15 cm B. 25 cm C. 35 cm D. 42 cm

22.

Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:

 A. 75 B. 81 C. 85 D. 89

23.

Find the highest common factor of 36 and 84.

 A. 4 B. 6 C. 12 D. 18

24.

Which of the following fraction is the largest ?

A.
 7 8
B.
 13 16
C.
 31 40
D.
 63 80

25.

The least number, which when divided by 12, 15, 20 and 54 leaves in each case a remainder of 8 is:

 A. 504 B. 536 C. 544 D. 548