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26 Jul 2018, 11:39
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C
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Difficulty:
55%
(hard)
Question Stats:
61% (02:10) correct
39%
(02:03)
wrong
based on 70
sessions
History
Date
Time
Result
Not Attempted Yet
A and B are distinct positive integers. What is A^B - B^A ?
(1) |A+B| = 6
(2) |A-B| = 2
(1) |A+B| = 6
(2) |A-B| = 2
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 Jul 2018, 11:56
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Is Ans C?
a & b are distinct +ve integers
1. a + b = 6 so possible combinations of (a, b) are (1,5)(2,4)(3,3)(4,2)(5,1) : a & b can be anything hence insufficient
2. | a - b | = 2 ; Again a & b can have many combination
1 & 2. we know a & b can be ( 2,4) or ( 4,2)
\(2^4\) - \(4^2\) = \(4^2\) - \(2^4\) = \(0\)
a & b are distinct +ve integers
1. a + b = 6 so possible combinations of (a, b) are (1,5)(2,4)(3,3)(4,2)(5,1) : a & b can be anything hence insufficient
2. | a - b | = 2 ; Again a & b can have many combination
1 & 2. we know a & b can be ( 2,4) or ( 4,2)
\(2^4\) - \(4^2\) = \(4^2\) - \(2^4\) = \(0\)
13 Aug 2024, 14:39
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