Aptitude - Problems on H.C.F and L.C.M - Discussion
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Read more:"Act well your part; there all honor lies."
- Alexander Pope
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Find the highest common factor of 36 and 84.
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4 | [B]. |
6 | | [C]. |
12 | [D]. |
18 |
Answer: Option E
Explanation:
36 = 22 x 32
84 = 22 x 3 x 7
 H.C.F. = 22 x 3 = 12.
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Prasanna said:
(Tue, Jun 8, 2010 06:26:39 AM)
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| I cant understand how this problem has solved ? actually what is the procedure ? tell me |
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Anshu said:
(Mon, Dec 6, 2010 08:58:22 AM)
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| Can anyone explain this problem clearly. |
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Aparna said:
(Mon, Dec 27, 2010 04:12:57 AM)
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firstly find the prime factors of both the numbers
then choose the common prime numbers whose power is less
tats the hcf |
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Prashant Pandey said:
(Tue, Feb 1, 2011 01:01:07 PM)
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36/2=18
18/2=9
9/3=3
3/3=1
that is 2*2*3*3
similarly for 86 and then take comman prime between them
and then multiply as above |
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Sanjeeb,Angul said:
(Tue, May 24, 2011 10:14:25 AM)
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| H.C.F OF 36 AND 84 is 12 so common factor is 12 |
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Rajkumar said:
(Sat, Jul 16, 2011 05:02:51 AM)
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Similarly 84/2=42
42/2=21
21/3=7
Then we have to take the common on both sides i.e from 2*2*3*2 and 2*2*3*7. thus 2*2*3=12. Hence the answer is obtained. |
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Raviteja said:
(Mon, Aug 22, 2011 04:30:10 PM)
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H.C.F OF 36 AND 84 is
36)84(2
72
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12)36(3
36
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X
so H.C.F=12. |
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