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TheUltimateWinner
Joined: 23 Feb 2015
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Schools: Harvard '24 Judge '23 LBS '24 McCombs '24 Mendoza Tepper '24 Ross '24 Cox Marshall '24 Fisher Kelley '24 Jones McDonough '24 Owen '24 Terry BU Simon '24 Katz GWU Mason Babson Gabelli Foster '24 Goizueta '24 Scheller Stern '23 CBS '23 Booth '23 Haas '25 Wharton '25 Stanford '26 Johnson'23 Fuqua '23 Kellogg '23 Kenan-Flagler'23 INSEAD Aug 22 intake Olin '23 Said '23 Sloan '23 Carey Arizona "22 Yale '23 UC Davis Madison '23 Anderson '23 Carroll Carlson '23 Darden '23
Posts: 2,464
12 Jul 2019, 10:12
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
50% (01:29) correct
50%
(01:07)
wrong
based on 76
sessions
History
Date
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Not Attempted Yet
\(a\), \(b\), and \(c\) are three integers such that \(a<b<c.\) Is \(a×b×c\) positive?
1) \(a×b\) is positive
2) \(c\) and \(b\) lie on either side of zero on the number line
1) \(a×b\) is positive
2) \(c\) and \(b\) lie on either side of zero on the number line
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
12 Jul 2019, 10:43
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2 is sufficient
1) a*b is positive a and b both could be positive in that case c would be positive
Or a and b both could be negative in this case c could be positive or negative. Hence not sufficient
2) c and b lie on either side which means b is negative and c is positive which implies a is negative
Hence a*b*c would be positive.hence sufficient
Posted from my mobile device
1) a*b is positive a and b both could be positive in that case c would be positive
Or a and b both could be negative in this case c could be positive or negative. Hence not sufficient
2) c and b lie on either side which means b is negative and c is positive which implies a is negative
Hence a*b*c would be positive.hence sufficient
Posted from my mobile device
12 Jul 2019, 11:12
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Asad
whether a*b*c is positive or not.
Note: there is no indication regarding sign of a, b, c. we only know their order.
Statement 1: a*b = positive. we don't know anything regarding c. if a and b are positive , c must be positive. in this case . ultimate result will be positive. what if a and b are negative but c is positive. NOT sufficient.
Statement 2 : c and b lie on either side of the zero on the number line. One of b and c must be negative. From the given sequence , it is clear that c is positive ,b is negative. a is lowest among three. a must be negative. So, we have 2 negative and 1 positive.
( - ) ( - ) ( + ) = positive.
Sufficient.
B is the correct answer.
