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Difficulty:
45%
(medium)
Question Stats:
46% (00:35) correct
54%
(00:31)
wrong
based on 1338
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How many minutes long is time period X?
(1) Time period X is 3 hours long.
(2) Time period X starts at 11 p.m. and ends at 2 a.m.
(1) Time period X is 3 hours long.
(2) Time period X starts at 11 p.m. and ends at 2 a.m.
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saukrit
Joined: 05 Jul 2018
Last visit: 23 Apr 2026
Posts: 378
Status:Current student at IIMB
Affiliations: IIM Bangalore
Location: India
Concentration: General Management, Technology
Schools: IIMB EPGP'22 (A)
GMAT 1: 600 Q47 V26
GRE 1: Q162 V149
GPA: 3.6
WE:Information Technology (Consulting)
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gmatbusters
Statement 1 X is 3*60 mins = 180 mins . Hence Statement 1 is SUFFICIENT
Statement 2 This stament also implies that X is 3 hours long Hence is equal to 180 mins. But wait, we do not know which days's 11pm and 2am are being talked about here. So we cant really say it that simplySo, Statement 2 is NOT SUFFICIENT
Hence answer is A
General Discussion
gmatbusters
These are really tricky ones , anyways .....my take :
1) Time frame is specified : 3hrs ==>180 mins : Sufficient
2) Time period X starts at 11 p.m. and ends at 2 a.m.
We may ask.... which 2 a.m. ? i.The immediate next of the stated 11 pm ? ==> 3 hrs ==>3*60 mins
or the one after the 1st 2am ? ==> 3 hrs ==>(3+24)*60 mins
or, the one after the 2nd 2am ? ==> 3 hrs ==>(3+48)*60 mins .......and so on...... : Not Sufficient
Hence Ans A.
sarahfiqbal
Joined: 06 Jan 2015
Last visit: 16 Aug 2021
Posts: 20
Status:Studying for GMAT
Location: United Kingdom
Posts: 20
Is this REALLY a GMAT level question? ..........or is it just those type of logic questions........... 
Posts: 1,925
Yes, it is GMAT OG question.
Posted from my mobile device
sarahfiqbal
Posted from my mobile device
Posts: 2
Wow. I know the GMAT questions are tricky but, this seemed like a stretch here, idk maybe it's just me
Posts: 2
Dope forum, really appreciating the help
GMATBusters
So the problem I had with A is that we don't know how many minutes there were or am I overthinking here?
e.g. 3 hours and 35 minutes. How many hours? 3.
e.g. 3 hours and 45 minutes. How many hours? 3
We couldn't assume that 11-2 on statement 2 is consecutive days, so we can't assume in statement 1 that 3 hours means exactly 3 hours either? Unless of course one spins this and says 3 hours and 35 minutes for example is ACTUALLY 3 and 7/12 hours?
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