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# M09 Q21

Author Message
Manager
Joined: 02 Aug 2009
Posts: 111
Followers: 2

Kudos [?]: 23 [0], given: 1

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31 Mar 2010, 13:20
If the operation # satisfies X # Y = 1/(X # Y) for any non-zero number X and Y, which of the following can be #?

1. X # Y = 1/XY
2. X # Y = X/Y
3. X # Y = XY

None
1 only
2 only
1 and 2 only
1 and 3 only

[Reveal] Spoiler:
None
Senior Manager
Affiliations: Volunteer Operation Smile India, Creative Head of College IEEE branch (2009-10), Chief Editor College Magazine (2009), Finance Head College Magazine (2008)
Joined: 26 Jul 2010
Posts: 467
Location: India
WE2: Entrepreneur (E-commerce - The Laptop Skin Vault)
Concentration: Marketing, Entrepreneurship
GMAT 1: 710 Q49 V38
WE: Marketing (Other)
Followers: 13

Kudos [?]: 156 [0], given: 24

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26 Sep 2010, 03:59
It has to be None

Coz if you replace each of the values in 1,2 & 3 in the original equation the final answer obtained is different than what we started with.

Nice question
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Kidchaos

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Re: M09 Q21   [#permalink] 26 Sep 2010, 03:59
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# M09 Q21

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