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Deborah and Mike visit the university library at regular intervals eve

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Deborah and Mike visit the university library at regular intervals eve  [#permalink]

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New post 15 Dec 2019, 02:56
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

63% (00:51) correct 38% (01:10) wrong based on 32 sessions

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Concentration: General Management, Strategy
GMAT 1: 580 Q41 V28
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WE: Project Management (Energy and Utilities)
Re: Deborah and Mike visit the university library at regular intervals eve  [#permalink]

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New post 15 Dec 2019, 04:28
1
Bunuel wrote:
Deborah and Mike visit the university library at regular intervals every 3 and 4 days respectively. If both of them were in the library on Monday, what day of the week will it be when they meet in the library again?

A. Wednesday
B. Thursday
C. Friday
D. Saturday
E. Sunday

M11-31


Saturday. Answer D. They will meet after (3*4) =12days. Monday+12 = Saturday
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Re: Deborah and Mike visit the university library at regular intervals eve  [#permalink]

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New post 29 Mar 2020, 03:58
Bunuel wrote:
Deborah and Mike visit the university library at regular intervals every 3 and 4 days respectively. If both of them were in the library on Monday, what day of the week will it be when they meet in the library again?

A. Wednesday
B. Thursday
C. Friday
D. Saturday
E. Sunday

M11-31


The LCM of 3 and 4 is 12, and that is the number of days until they will again meet. Since 7 days from Monday is again Monday, 5 days after that is Saturday.

Answer: D
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Re: Deborah and Mike visit the university library at regular intervals eve  [#permalink]

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New post 29 Mar 2020, 05:45

Solution



Given
In this question, we are given that
    • Deborah and Mike visit the university library at regular intervals every 3 and 4 days respectively.
    • Both of them were in the library on Monday.

To find
We need to determine
    • On what day of the week they will meet in the library again

Approach and Working out
As they are visiting at intervals of 3 and 4 days, they will be meeting again on LCM(3, 4) = 12th day from their first meeting
    • 12th day from Monday = Saturday

Thus, option D is the correct answer.

Correct Answer: Option D
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Re: Deborah and Mike visit the university library at regular intervals eve   [#permalink] 29 Mar 2020, 05:45

Deborah and Mike visit the university library at regular intervals eve

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