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If x and y are positive integers, what is the value of x +

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Manager
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If x and y are positive integers, what is the value of x + [#permalink] New post 30 Oct 2008, 17:34
00:00
A
B
C
D
E

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If x and y are positive integers, what is the value of x + y?
(1) 2 raised to x * 3 raised to y = 72
(2) 2 raised to x * 2 raised to y = 32

Answer with explanation. I will provide OA shortly

Last edited by amitdgr on 31 Oct 2008, 06:05, edited 1 time in total.
corrected the typo
Senior Manager
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Re: DS: x and y [#permalink] New post 30 Oct 2008, 17:49
A

1. 2^x*3^y = 2^3*3^2
x = 3, y =2 - Suff

2. 2^(x+y) = 2^5
x+y =5 - Insuff
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Re: DS: x and y [#permalink] New post 30 Oct 2008, 19:17
That's not the answer - but thank you for the explanation of the first sufficiency. The OA is D.
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Re: DS: x and y [#permalink] New post 30 Oct 2008, 19:29
Can you pls explain why the answer is D ? I get A
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Re: DS: x and y [#permalink] New post 30 Oct 2008, 22:01
tharunv, can you please check if the question does not ask for the value of (x+y). In the present form of the question, answer should be A only.
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Re: DS: x and y [#permalink] New post 31 Oct 2008, 02:52
Sorry guys - my mistake - it is "what is the value of x + y" - a typo on my part - hope this clarifies things...
Re: DS: x and y   [#permalink] 31 Oct 2008, 02:52
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