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17 Oct 2009, 23:27
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
73% (00:50) correct
27%
(00:58)
wrong
based on 207
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of (x + y)^4?
(1) The product of x and y is 7.
(2) x and y are integers.
Modified from: what-is-the-value-of-x-y-128238.html
(1) The product of x and y is 7.
(2) x and y are integers.
Modified from: what-is-the-value-of-x-y-128238.html
18 Oct 2009, 00:09
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GMAT TIGER
What is the value of \((x + y)^4\)?
(1) The product of x and y is 7.
(2) x and y are integers.
Modified from: what-is-the-value-85380.html
(1) The product of x and y is 7.
(2) x and y are integers.
Modified from: what-is-the-value-85380.html
1. insuff as x and y can have lot of different values ( x= 1 y =7 , or x=1/7 and y = 49)
2. insuff as x and y can be any integer (x=1 y=2, x= -4 y=4)
taking both we know xy =7 and are integers. Only values satisfying this is x= -1 and y =-7 or x=1 and y=7 (values can be interchanged)
so we get (-1 + -7)^4 or (1+7)^4 which gives the same value. hence C is suff
18 Oct 2009, 05:11
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It is essentially the same as the previous non-modified version.
Ans should still be C.
Or is there a vicious trap !
Ans should still be C.
Or is there a vicious trap !
