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tedious one

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by hakyology » Mon Jul 07, 2008 7:47 am
If it is 6:27 in the evening on a certain day, what time in the morning was it exactly 2,880,7171 minutes earlier? (Assume standard time in one location)
A-6:22
B-6:24
C-6:27
D-6:30
E-6:32


THE ANSWER IS D. PLEASE EXPLAIN. THANK YOU.
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Re: tedious one

by parallel_chase » Mon Jul 07, 2008 2:03 pm
hakyology wrote:If it is 6:27 in the evening on a certain day, what time in the morning was it exactly 2,880,7171 minutes earlier? (Assume standard time in one location)
A-6:22
B-6:24
C-6:27
D-6:30
E-6:32


THE ANSWER IS D. PLEASE EXPLAIN. THANK YOU.
I cant figure out an easier way. Above all, with answer choices so close i dont think there is an easier way of getting the answer.

If a question like this appears on the GMAT, I am guessing and moving on unless it is the last question in quant section. I dont want to ruin my verbal.

Anyway, if anybody find an easier way pls do help.

In which book did you find such a question.
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Re: tedious one

by Ian Stewart » Mon Jul 07, 2008 4:15 pm
hakyology wrote:If it is 6:27 in the evening on a certain day, what time in the morning was it exactly 2,880,7171 minutes earlier? (Assume standard time in one location)
A-6:22
B-6:24
C-6:27
D-6:30
E-6:32


THE ANSWER IS D. PLEASE EXPLAIN. THANK YOU.
There is something wrong with the question, or with the answer choices. If you take away anything ending in 1 from anything ending in 7 (assuming everything is positive), the answer will end in 6. None of the answers ends in 6. In any case, 2,880,7171 is not proper notation for a number!
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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by Ian Stewart » Mon Jul 07, 2008 4:19 pm
I thought I remembered the problem. Solved here:

www.beatthegmat.com/time-question-t13009.html
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by parallel_chase » Tue Jul 08, 2008 12:06 am
Ian Stewart wrote:I thought I remembered the problem. Solved here:

www.beatthegmat.com/time-question-t13009.html
Can you pls explain the logic behind subtracting. Thanks.
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by Ian Stewart » Tue Jul 08, 2008 5:32 am
parallel_chase wrote:
Ian Stewart wrote:I thought I remembered the problem. Solved here:

www.beatthegmat.com/time-question-t13009.html
Can you pls explain the logic behind subtracting. Thanks.
I've tried to do so at the link above. Hope it's clear.
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by wilderness » Tue Jul 08, 2008 7:14 am
Hi hakyology,

I think you made a typing mistake here. In the other link that Ian mentioned the last digit is 7, your question has an extra 1 in the end and that is not possible with any of the options here.

Can you please check.

Regards,
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