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If the time is currently 1:30 pm, what time will it be in exactly 647

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If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 23 Apr 2012, 05:55
2
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C
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Question Stats:

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If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 23 Apr 2012, 06:24
1
dzodzo85 wrote:
If the time is currently 1:30pm, what time will it be in exactly 647 hours?

A. 12:30am
B. 1:30am
C. 12:30pm
D. 2:30pm
E. 10:30pm

I felt this question was tricky though.


Every 24 hours will bring us to the same 1:30pm. 648 is divisible by 24 (27*24=648), so if it were 648 hours we would have 1:30pm, but since it's 647 hours then it will be 1 hour less, so 12:30pm.

Answer: C.
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 21 Jul 2015, 02:32
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Bunuel wrote:
If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm

Kudos for a correct solution.


24 hours later the time remains same as seen in clock

i.e. After any number of Hours that is multiple of 24 hours, the time remains same

647 = 26*24 + 23
i.e. 26 days past and 23 hours past 1:30 PM time will be 12:30 PM

Answer: option C
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 21 Jul 2015, 02:43
1
Bunuel wrote:
If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm

Kudos for a correct solution.


647 hours = 26 days (1 day = 24 hours) + 23 hours ---> thus time after 647 hours will be 1:30 PM + 23 hours ---> 12:30 PM, C is the correct answer.
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 21 Jul 2015, 07:18
1
600 hours = 600/24 = 25 days.

So, 648 hours = 648/24 = 27 days.

647 hours = 27 days - 1 hour, so in 647 hours it will be 12:30 PM. Ans (C).
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 21 Jul 2015, 07:45
1
Bunuel wrote:
If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm

Kudos for a correct solution.



648 is a multiple of 24, so after 648 hrs , it will be 1:30 pm again
after 647 it will be 1 hr lesser 12:30 pm
C
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 21 Jul 2015, 08:51
1
Bunuel wrote:
If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm

Kudos for a correct solution.


647/24 = 26 and a remainder of 23 hours. We don't have to take care about the 26 days which passed. Only consider the 23 hours.

Assume if 24 hours passed, the time would be 1:30 pm again, but it is one less, therefore it must be 12:30 pm.

Answer C
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 26 Jul 2015, 10:44
Bunuel wrote:
If the time is currently 1:30 pm, what time will it be in exactly 647 hours?

A. 12:30 am
B. 1:30 am
C. 12:30 pm
D. 2:30 pm
E. 10:30 pm

Kudos for a correct solution.


800score Official Solution:

If we divide 647 by 24, not arriving at a decimal, but rather keeping the answer in terms of an integer and the remainder, this number will represent the number of days and hours later that 647 hours is:
647/24 = 26, remainder 23.
Therefore, 647 hours from now is the same as 26 days and 23 hours from now.

The time will be exactly 1 hour earlier in the day, so it will be 12:30 pm.

The correct answer is choice (C).
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 27 Feb 2017, 05:59
647 hours means 26 days and 23 hours
23 hours means 1 hour less from 1 day.
Hence the time will be 12:30pm.
Option C
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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New post 17 Jun 2017, 10:20
dzodzo85 wrote:
If the time is currently 1:30pm, what time will it be in exactly 647 hours?

A. 12:30am
B. 1:30am
C. 12:30pm
D. 2:30pm
E. 10:30pm

I felt this question was tricky though.

I started the same way as Bunuel, above. That is, every 24 hour rotation of the clock puts us at 1:30 p.m.

So 647 / 24 = 26 days with remainder of 23 hours.

These clock questions sometimes get tricky, so because I had 23 hours extra, I counted forward 23 hours:

12 hrs to 1:30 a.m., then

11 hrs to 12:30 p.m.

Not as simple as Bunuel's method, but especially if you are unsure about whether to go back or forward, and/or not used to military time, the
+23 remainder way works too.

Hope it helps.

Answer C
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Re: If the time is currently 1:30 pm, what time will it be in exactly 647  [#permalink]

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