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# If Juan had a doctor's appointment on a certain day, was the

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Manager
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If Juan had a doctor's appointment on a certain day, was the [#permalink]

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12 Aug 2007, 21:14
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If Juan had a doctor's appointment on a certain day, was the appoinment on a Wedneseday?

(1) Exactly 60 hours before the appointment, it was Monday.

(2) The appointment was between 1:00 pm and 9:00 pm

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-juan-had-a-doctor-s-appointment-on-a-certain-day-was-the-129047.html
[Reveal] Spoiler: OA

Last edited by Bunuel on 03 Feb 2014, 05:14, edited 1 time in total.
Renamed the topic, edited the question and added the OA.

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Director
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Re: OG11 96 DS - Doctor's Appt [#permalink]

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12 Aug 2007, 21:27
helpmeongmat wrote:
If Juan had a doctor's appointment on a certain day, was the appointment on a Wednesday?

1) Exactly 60 hours before the appointment, it was Monday.
2) The appointment was between 1:00 pm and 9:00 pm.

Thanks! Please let me know if it is on Wednesday what time it would occur.

C. using 1 and 2, the appointment was on wed.

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Director
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Re: OG11 96 DS - Doctor's Appt [#permalink]

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12 Aug 2007, 21:56
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helpmeongmat wrote:
If Juan had a doctor's appointment on a certain day, was the appointment on a Wednesday?

1) Exactly 60 hours before the appointment, it was Monday.
2) The appointment was between 1:00 pm and 9:00 pm.

Thanks! Please let me know if it is on Wednesday what time it would occur.

i think the answer is C

1) tells us prior to appt, 60 hrs = 2.5 days -> it was Monday
picking arbitrary times
Monday @ 12am = appt was on Wednesday @ noon
Monday @ 10pm = appt happened on Thursday @ 10am
not sufficient

2) appt was between 1pm and 9pm
only tells us the block of time appt occurred and not the day
not sufficient

putting 1) and 2) together, 60 hrs prior to Wed 1pm and 9pm
Monday @ 1am + 60 hrs = Wed @ 1pm
Monday @ 9am + 60 hrs = Wed @ 9pm

So using both statements we know that appt was on Wed

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Director
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13 Aug 2007, 02:33
C

but he does not have an appointment on Wed It's on Thurs.

1pm + 24 = Tues
+ 24 = Wed
+ 12 = 1am Thurs.

9pm is even later on Thursday.

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13 Aug 2007, 11:53
dahcrap wrote:
I feel it is E. Is there an OA and OE for this ?

Statement 1 doesn't tell us anything concrete by saying 60 hours prior it was Monday.

If the appointment was 5:00PM Wednesday afternoon than 60 hours prior would be 5:00AM Monday morning which would be A-OK.

However, if the appointment was 12:00AM Thursday morning than 60 hours prior would be 12:00PM Monday afternoon. In fact, 60 hours prior just shows that the appointment has to be between 12:00PM Wednesday and 12:00PM Thursday.

the second statement saying it was between 1 and 9 PM doesn't mean anythign on it's own, but given our 12-12 constraint from the first statement it proves the appt is in fact on Wednseday.

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Manager
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13 Aug 2007, 17:00
C

but he does not have an appointment on Wed It's on Thurs.

1pm + 24 = Tues
+ 24 = Wed
+ 12 = 1am Thurs.

9pm is even later on Thursday.

You're counting up from 1p.m. on Monday - you should be counting back from 1p.m. on Wednesday, since the appt was not on Monday. The 1 - 9 p.m. time span was for the day of the appt. Counting back from 1 p.m. on Wednesday takes you to 1 a.m. on Monday.

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Re: OG11 96 DS - Doctor's Appt [#permalink]

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26 Oct 2011, 02:27
helpmeongmat wrote:
If Juan had a doctor's appointment on a certain day, was the appointment on a Wednesday?

1) Exactly 60 hours before the appointment, it was Monday.
2) The appointment was between 1:00 pm and 9:00 pm.

Thanks! Please let me know if it is on Wednesday what time it would occur.

Is there a methodical way to solve this problem? Picking arbitary numbers is a pain and waste of time ... I would appreciate it if someone has some method to solve this problem ....

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Re: OG11 96 DS - Doctor's Appt [#permalink]

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26 Oct 2011, 02:52
siddhans wrote:
Is there a methodical way to solve this problem? Picking arbitary numbers is a pain and waste of time ... I would appreciate it if someone has some method to solve this problem ....

It's not arbitary... it's perfectly logical.
60 hrs-2.5 days before the appointment.
If the appointment is during the specified time period of that day only then can one confirm the day of the appointment.

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Manager
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Re: OG11 96 DS - Doctor's Appt [#permalink]

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26 Oct 2011, 10:33
It's not arbitrary test the lower and upper ranges in 2 to solve

Posted from GMAT ToolKit

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Manager
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Re: OG11 96 DS - Doctor's Appt [#permalink]

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01 Nov 2011, 16:43
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C. look for the extremes and prove them.

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10 Dec 2011, 00:26
Robin in NC wrote:
C

but he does not have an appointment on Wed It's on Thurs.

1pm + 24 = Tues
+ 24 = Wed
+ 12 = 1am Thurs.

9pm is even later on Thursday.

You're counting up from 1p.m. on Monday - you should be counting back from 1p.m. on Wednesday, since the appt was not on Monday. The 1 - 9 p.m. time span was for the day of the appt. Counting back from 1 p.m. on Wednesday takes you to 1 a.m. on Monday.

why should we count back from 1PM on Wednesday? I agree with 'StartupAddict'. Even I got Thursday.

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Re: If Juan had a doctor's appointment on a certain day, was the [#permalink]

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10 Dec 2011, 07:39
Together:
Taking the extreme range:
Say the appointment is on 1PM Wednesday. 48 hrs ago it was Monday 1 PM. 60 hrs ago it was Monday 1 PM -12 hrs= Monday 1 AM
Say the appointment is on 9PM Wednesday. 48 hrs ago it was Monday 9 PM. 60 hrs ago it was Monday 9 PM -12 hrs= Monday 9 AM
The appointment has to be on Wednesday.

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Re: If Juan had a doctor's appointment on a certain day, was the [#permalink]

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03 Feb 2014, 01:25
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Re: If Juan had a doctor's appointment on a certain day, was the [#permalink]

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03 Feb 2014, 05:15
If Juan had a doctor's appointment on a certain day, was the appointment on a Wednesday?

(1) Exactly 60 hours before the appointment, it was Monday --> 60 hours = 2.5 days. Now, check some extreme cases: if 2.5 days before the appointment it was 1:00 o'clock on Monday then after 2.5 days it would be 13:00 on Wednesday but if 2.5 days before the appointment it was 13:00 o'clock on Monday then after 2.5 days it would be 1:00 on Thursday. Not sufficient.

(2) The appointment was between 1:00 pm and 9:00 pm. Clearly insufficient.

(1)+(2) The appointment could not have been on Thursday, because 2.5 days prior any time from 1:00 pm and 9:00 pm on Thursday is not Monday. So, the appointment was on Wednesday. Sufficient.

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-juan-had-a-doctor-s-appointment-on-a-certain-day-was-the-129047.html
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Re: If Juan had a doctor's appointment on a certain day, was the   [#permalink] 03 Feb 2014, 05:15
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