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If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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03 Jul 2018, 09:49
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If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following must be true? A. ab < 0 B. ab > 0 C. a  b > 0 D. a + b < 0 E. a + b > 0
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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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03 Jul 2018, 09:56
oskarw93s wrote: B
Posted from my mobile device Hi, just stating the answer won't help anyone including yourself. Try to elaborate on the approach you used to solve the question; that way, if you would have had any wrong in your strategy then someone might be able to point that out, helping the community !
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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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03 Jul 2018, 10:37
Bunuel wrote: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following must be true?
A. ab < 0
B. ab > 0
C. a  b > 0
D. a + b < 0
E. a + b > 0 For this equation to be true .. a and b both should either positive or negative .. Which is ab>0 .. Hence B. Sent from my A0001 using GMAT Club Forum mobile app



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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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17 Jul 2018, 17:09
Bunuel wrote: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following must be true?
A. ab < 0
B. ab > 0
C. a  b > 0
D. a + b < 0
E. a + b > 0 Given a + b = a + b Let assume the value of a and b a = 2 or 2 b = 2 or 2 Both cases given equation is true. Either both of the a and b are positive or both of them are negative. Other combinations are not working here. Thus ab>0 is true. The best answer is B.



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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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17 Jul 2018, 21:53
Bunuel wrote: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following must be true?
A. ab < 0
B. ab > 0
C. a  b > 0
D. a + b < 0
E. a + b > 0 When is this possible, ONLY when both a and b are on same side of 0 or in other words both have same sign... Please see attached figure.. If a and b are of same sign a*b>0 B
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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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04 Aug 2019, 09:56
The Strategy  Both of them have to be of same sign for the condition to be valid. Hence B.
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Re: If a + b = a + b, a ≠ 0, and b ≠ 0, then which of the following
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04 Aug 2019, 09:56






