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26 Nov 2020, 01:20
Kudos
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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:
25%
(medium)
Question Stats:
66% (00:44) correct
34%
(00:42)
wrong
based on 50
sessions
History
Date
Time
Result
Not Attempted Yet
On the number line above, is the product of a, b, c, and d positive?
(1) The product of c and d is positive
(2) a is positive
(1) The product of c and d is positive
(2) a is positive
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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
26 Nov 2020, 07:08
Kudos
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Hoozan
Statement 1: The product of c and d are positive
If c and d are positive, it means they are greater than a and b. Here we can have b positive and a = 0, then a * b * c * d = 0, which is neither positive or negative
If c and d are negative, then a and b also have to be negative, then the product will be positive.
Therefore Statement 1 is insufficient. Answer options could be B, C or E.
Statement 2: a is positive
This means that b, c and d will all be positive as a is the smallest number and is positive. The product of the 4 numbers is positive.
Option B
Arun Kumar
