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A wall clock alarms every 4 minutes whereas a table clock alarms every
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11 Jul 2023, 00:15
11 Jul 2023, 00:15
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A wall clock alarms every 4 minutes whereas a table clock alarms every 10 minutes. If the wall clock and the table clock both alarmed at 10:15am on a particular day, which of the following would be the time when both the clocks will alarm together?
A. 2:30pm
B. 4:45pm
C. 5:10pm
D. 6:35pm
E. 8: 50pm
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A. 2:30pm
B. 4:45pm
C. 5:10pm
D. 6:35pm
E. 8: 50pm
Post A Detailed Correct Solution For The Above Questions And Get Kudos.
Question From Our Project: Free GRE Prep Club Tests in Exchange for 20 Kudos
\(\Longrightarrow\) GRE - Quant Daily Topic-wise Challenge
\(\Longrightarrow\) GRE NUMBER PROPERTIES
Re: A wall clock alarms every 4 minutes whereas a table clock alarms every
[#permalink]
07 Aug 2023, 22:30
07 Aug 2023, 22:30
Expert Reply
OE
As the wall clock alarms every 4 minutes and the table clock alarms every 10
minutes, thus both the clock once alarmed together will again alarm simultaneously
after every 20 minutes which is the ๐ฟ๐ถ๐ of 4 and 10, i.e. , 20 minutes, 40 minutes, โฆ
As they alarmed simultaneously at 10: 15 ๐๐, hence they will again alarm together
at 10.35 am, 10.55 am, 11.15 am, 11.35 am, 11.55 am, 12.15 pm and so on.
That means both wall clock and table clock always going to alarm on timings like
2.15, 2.35, 2.55, 3.15, 3.35, or time which ends with 15, 35 or 55...
Thus, the Answer would be 6: 35 ๐๐
Ans. (D)
As the wall clock alarms every 4 minutes and the table clock alarms every 10
minutes, thus both the clock once alarmed together will again alarm simultaneously
after every 20 minutes which is the ๐ฟ๐ถ๐ of 4 and 10, i.e. , 20 minutes, 40 minutes, โฆ
As they alarmed simultaneously at 10: 15 ๐๐, hence they will again alarm together
at 10.35 am, 10.55 am, 11.15 am, 11.35 am, 11.55 am, 12.15 pm and so on.
That means both wall clock and table clock always going to alarm on timings like
2.15, 2.35, 2.55, 3.15, 3.35, or time which ends with 15, 35 or 55...
Thus, the Answer would be 6: 35 ๐๐
Ans. (D)
gmatclubot
Re: A wall clock alarms every 4 minutes whereas a table clock alarms every [#permalink]
07 Aug 2023, 22:30
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