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OneTwoThreeFour
- Senior | Next Rank: 100 Posts
- Posts: 85
- Joined: Sat Jan 01, 2011 11:57 am
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Is xy = -1?
(1) x=y
(2) y=1
The correct answer is [spoiler] A. Either I am legally retarded or there is a mistake in the question. Why isn't (2) also correct? If y=1, then x(1) =-1. So x has to be -1. Therefore, xy = (-1)(1)= -1. Help me out here[/spoiler]
(1) x=y
(2) y=1
The correct answer is [spoiler] A. Either I am legally retarded or there is a mistake in the question. Why isn't (2) also correct? If y=1, then x(1) =-1. So x has to be -1. Therefore, xy = (-1)(1)= -1. Help me out here[/spoiler]
