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05 May 2016, 07:53
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
50% (01:36) correct
50%
(01:22)
wrong
based on 2
sessions
History
Date
Time
Result
Not Attempted Yet
If a and b are non-zero integers, is −1 a
(2) ab > 0
(2) ab > 0
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05 May 2016, 08:08
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(1) is not sufficient
we just need to test a=-2 , b=1 and a=1 , b=2 to confirm
(2) only tells us that a and b have the same signal, which is not sufficient
(1) and (2) are sufficient
In my opinion, the correct answer is C
PS: this is my first time here. I apologize in advance for any mistake I may have made
we just need to test a=-2 , b=1 and a=1 , b=2 to confirm
(2) only tells us that a and b have the same signal, which is not sufficient
(1) and (2) are sufficient
In my opinion, the correct answer is C
PS: this is my first time here. I apologize in advance for any mistake I may have made
05 May 2016, 08:16
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St1: b > a --> If b = 4; a = 3, is -1 < a/b < 1 ? Yes
If b = -3; a = -4, is -1 < a/b < 1 ? No
Not Sufficient
St2: ab > 0 --> a and b are of same sign --> Clearly insufficient
Combining St1 and St2: Both the cases that are shown in St1 still exist.
Not Sufficient
Answer: E
If b = -3; a = -4, is -1 < a/b < 1 ? No
Not Sufficient
St2: ab > 0 --> a and b are of same sign --> Clearly insufficient
Combining St1 and St2: Both the cases that are shown in St1 still exist.
Not Sufficient
Answer: E
