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# Does x + y = xy? (1) x is neither a positive integer nor a

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Senior Manager
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Does x + y = xy? (1) x is neither a positive integer nor a [#permalink]

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28 Jun 2006, 00:52
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19. Does x + y = xy?

(1) x is neither a positive integer nor a negative integer
(2) y is neither a positive integer nor a negative integer
SVP
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28 Jun 2006, 01:13
C.

1) x is a fraction. y can be anything. Hence not suff
2) y is a fraction. x can be anything. Hence not suff

Both

X and Y can be both fractions hence suff to say that x+y not equal xy
Remember 0 is a positive integer
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28 Jun 2006, 01:24
Zero is an even integer but neither positive nor negative integer.
Senior Manager
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28 Jun 2006, 07:57
good one..

i missed the fraction part initially.

x = 0, y= 0 then x + y = xy

x = 1/2, y = 1/2 then x +y != xy

hence E.
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28 Jun 2006, 08:17
(E)

x and y can be either 0 or fractions.. which makes both conditions insufficient.
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28 Jun 2006, 08:52
19. Does x + y = xy?

(1) x is neither a positive integer nor a negative integer
(2) y is neither a positive integer nor a negative integer

Wow, a super tricky question.
I also picked C
x and y don't have to be integers!
CEO
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28 Jun 2006, 09:09
shampoo wrote:
19. Does x + y = xy?

(1) x is neither a positive integer nor a negative integer
(2) y is neither a positive integer nor a negative integer

Wow, a super tricky question.
I also picked C
x and y don't have to be integers!

Thats the human mind. If you say neither a +ve integer nor a -ve integer then most of people will choose x and y as integers.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Re: DS - tricky   [#permalink] 28 Jun 2006, 09:09
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