amrishsoni86 wrote:
Bunuel wrote:
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 --> 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.
Answer: C.
Hi Bunuel,
Have a specific question with the solution.
The question stem specifically ask whether the day is Wednesday. Statement 1 mentioned that exactly 60 hours before the appointment was Monday. Hence for this particular statement don't you think one should calculate in reverse order.
If the appointment was on 9.00 pm of Wednesday, 60 hours before this time will be for sure Monday. But if the appointment on 9.00 am of Wednesday, 60 hours before this time will be for sure Sunday. However, the later part is out of scope, because statement 1 is mentions that exactly 60 hours before the appointment was Monday.
Where is my reasoning incorrect?
Thanks in advance.
Amrish
IMO, you are correct that per statement 1 , the process should be looked at in reverse. For any particular day, the 24 hours start from 0000 hours to 2359 hours. So per statement 1, 60 hours before the appointment was a monday. Now lets think it this way:
For the actual appointment to be on wednesday, think of it this way:
60 hours before 2359 on Wednesday : 1159 (or 1159 AM on Monday) but 60 hours from 0000 Wednesday fall on 1200 on Sunday. Thus , this statement is not sufficient and additionally, for the appointment to be on wednesday and 60 hours being Monday , the only scenario is for the appointment to be between 1201 and 2359 hours on wednesday.
From my experience, one of the 2 statements (sometimes) throws us a hint or two about some of the cases we might have missed. For this question. statement 2 gave me the hint to think about the period from 1 pm to 9 pm in particular (though this method might not be applicable to all the questions and lead to unnecessary time wastage!).
Hope this is clear.
Agree Engr2012. However, after heavily solving statement 1 when one read statement 2, one start using the information together and do not realize that statement 2 alone could have answered
. May be a trap that I always fall to, I have to overcome this.
Anyway, thanks for your effort to explain. All the best. Amrish