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06 Nov 2014, 09:20
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B
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Difficulty:
45%
(medium)
Question Stats:
69% (02:14) correct
31%
(02:26)
wrong
based on 390
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If x is a non-zero integer, what is the value of xy?
(1) x = 2
(2) \(128^x*6^{(x + y)} = 48^{(2x)}*3^{(-x)}\)
(1) x = 2
(2) \(128^x*6^{(x + y)} = 48^{(2x)}*3^{(-x)}\)
intheend14
GMAT 1: 740 Q49 V41
Posts: 125
06 Nov 2014, 10:24
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Statement 1 is clearly insufficient.
Statement 2: You can combine all the bases with the exponent "x". They all end up cancelling out and yielding 6^y=1^x. Here, 1^x is always equal to 1, so 6^y=1 and that should be sufficient.
Answer B
Statement 2: You can combine all the bases with the exponent "x". They all end up cancelling out and yielding 6^y=1^x. Here, 1^x is always equal to 1, so 6^y=1 and that should be sufficient.
Answer B
navkaran
Joined: 27 Jul 2012
Last visit: 05 May 2016
Posts: 25
Given Kudos: 14
Schools: Stanford '17 (II) HBS '18 (S) Kellogg '18 Wharton '18 (S) CBS Anderson '18 ISB '17 Sloan '18
Schools: Stanford '17 (II) HBS '18 (S) Kellogg '18 Wharton '18 (S) CBS Anderson '18 ISB '17 Sloan '18
Posts: 25
06 Nov 2014, 13:15
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Statement 1 not sufficient since we clearly dont know value of y
Statement 2 can be simplified to reach 2^y*3^y=1, 6^y=1
This means y=0
This is enough to find xy that is 0
Answer B
Statement 2 can be simplified to reach 2^y*3^y=1, 6^y=1
This means y=0
This is enough to find xy that is 0
Answer B
