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# LCM

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Intern
Joined: 17 Apr 2010
Posts: 38
Followers: 1

Kudos [?]: 8 [0], given: 25

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22 Apr 2010, 12:58
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Question Stats:

100% (03:36) correct 0% (00:00) wrong based on 2 sessions

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51. What is the least common multiple of 8, 9, 10, 11, 12 and 24?

How would you approach this? Please explain step by step. Thx.
_________________

Consider giving kudos, if you like my thread!

FYI: Questions are from the workbook of my prep course.

VP
Joined: 05 Mar 2008
Posts: 1472
Followers: 11

Kudos [?]: 269 [1] , given: 31

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22 Apr 2010, 13:09
1
KUDOS
gmatt14 wrote:
51. What is the least common multiple of 8, 9, 10, 11, 12 and 24?

How would you approach this? Please explain step by step. Thx.

8 = 2 x 2 x 2
9 = 3 x 3
10 = 5 x 2
11 = 11
12 = 2 x 2 x 3
24 = 2 x 2 x 2 x 3

You take each unique prime. If a unique prime appears more than once you use the one the primes that appear the most. For example, a 2 appears in 8, 10, 12, 24 but appears 3 times (the most)

2x2x2x5x3x3x11 = 3960
Intern
Joined: 17 Apr 2010
Posts: 38
Followers: 1

Kudos [?]: 8 [0], given: 25

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23 Apr 2010, 05:53
How simple is that........you just gotta know how.

I appreciate it.
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Consider giving kudos, if you like my thread!

FYI: Questions are from the workbook of my prep course.

Re: LCM   [#permalink] 23 Apr 2010, 05:53
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