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Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to

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Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to  [#permalink]

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New post 03 Aug 2018, 10:40
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E

Difficulty:

  55% (hard)

Question Stats:

64% (01:57) correct 36% (01:42) wrong based on 47 sessions

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Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to Atlanta departed at equally spaced times and all flights to New York City departed at equally spaced times. A flight to Atlanta and a flight to New York City both departed from Airport X at 1:00 p.m. yesterday. Between 1:00 p.m. and 3:00 p.m. yesterday, did another pair of flights to these 2 cities depart from Airport X at the same time?

(1) Yesterday at Airport X, a flight to Atlanta and a flight to New York City both departed at 10:00 a.m.
(2) Yesterday at Airport X, flights to New York City departed every 15 minutes between 9:00 a.m. and 6:00 p.m.


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(DS15938)

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Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to  [#permalink]

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New post 04 Aug 2018, 03:18
1
Bunuel wrote:
Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to Atlanta departed at equally spaced times and all flights to New York City departed at equally spaced times. A flight to Atlanta and a flight to New York City both departed from Airport X at 1:00 p.m. yesterday. Between 1:00 p.m. and 3:00 p.m. yesterday, did another pair of flights to these 2 cities depart from Airport X at the same time?

(1) Yesterday at Airport X, a flight to Atlanta and a flight to New York City both departed at 10:00 a.m.
(2) Yesterday at Airport X, flights to New York City departed every 15 minutes between 9:00 a.m. and 6:00 p.m.


NEW question from GMAT® Quantitative Review 2019


(DS15938)


Given departure timeline:- 9:00 a.m.- 6:00 p.m
Simultaneous departure:- 1.00 p.m.
Flight departure restriction:- At equal intervals

Question stem:- Is there any simultaneous departure between 1:00 p.m. and 3:00 p.m. yesterday ?

Missing information:- 1)1st departure time of flights(both type) at Airport X. (because this is the key parameter to ascertain the successive departure time of flights) 2) Magnitude of equal interval for each type of flight(To NYC & To Atlanta).

St1:- Yesterday at Airport X, a flight to Atlanta and a flight to New York City both departed at 10:00 a.m.

Case-I (say 1st departure at 9:30 a.m. to both the air stations at an equal interval of 30 min)
Flight to Atlanta--------------------------------Flight to NYC
9:30 a.m.------------------------------------------9:30a.m.
10:00 a.m.----------------------------------------10:00 am
.
.
1:00 p.m.----------------------------------------1.00 p.m.
1:30 p.m.----------------------------------------2:00 p.m.
so on till 6p.m.
There were simultaneous departures between 1:00 p.m. and 3:00 p.m.

Case-II (say 1st departure at 9:30 a.m. to Atlanta at an interval of 30 min and 1st departure at 10 a.m. to NYC at an equal interval of 3hr)
Flight to Atlanta--------------------------------Flight to NYC
9:30 a.m.------------------------------------------10:00a.m.
10:00 a.m.----------------------------------------1:00 p.m.
.
.
1:00 p.m.----------------------------------------4.00 p.m.
1:30 p.m.
so on till 6p.m.
There were no simultaneous departures between 1:00 p.m. and 3:00 p.m.

Case-III (say 1st departure at 10:00 a.m. to both the air stations at an equal interval of 3 hours)
Flight to Atlanta--------------------------------Flight to NYC
10:00 a.m.------------------------------------------10:00 a.m.
1:00 p.m.----------------------------------------1:00 p.m.
4:00 p.m.----------------------------------------4:00 p.m.
There were no simultaneous departures between 1:00 p.m. and 3:00 p.m.
Therefore, insufficient.

St2:- Yesterday at Airport X, flights to New York City departed every 15 minutes between 9:00 a.m. and 6:00 p.m
Case-I (say 1st departure at 9:15 a.m. to both the air stations at an equal interval of 15 min)
Flight to Atlanta--------------------------------Flight to NYC
9:15 a.m.------------------------------------------9:15a.m.
.
.
1:00 p.m.----------------------------------------1.00 p.m.
1:15 p.m.----------------------------------------1:15 p.m.
1:30 p.m.----------------------------------------1:30 p.m.
1:30 p.m.----------------------------------------2:00 p.m.
so on till 6p.m.
There were simultaneous departures between 1:00 p.m. and 3:00 p.m.

Case-II (say 1st departure at 10 a.m. to Atlanta at an interval of 3hours and 1st departure @9:15 a.m. to NYC at an equal interval of 15 min)
Flight to Atlanta--------------------------------Flight to NYC
10:00 a.m.------------------------------------------9:15 a.m.
1:00 p.m.-----------------------------------9:30 a.m.
.
.
4:00pm-----------------------------------------------1:00 p.m

There were no simultaneous departures between 1:00 p.m. and 3:00 p.m.

Insufficient.

Combining, we have the same situation as depicted in st1 and st2. We are still searching for the missing info.

Therefore, insufficient.

(E)
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Yesterday between 9:00 a.m. and 6:00 p.m. at Airport X, all flights to &nbs [#permalink] 04 Aug 2018, 03:18
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