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Is x a negative number? (1) x2 is a positive number. (2) x
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31 May 2009, 07:23

3

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

100% (00:41) correct 0% (00:00) wrong based on 73 sessions

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Is x a negative number?

(1) x2 is a positive number.

(2) x · |y| is not a positive number.

Please discuss.

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Stmt 1 - Tells us that X is either -ve or +ve. Stmt 2 - Tells us that X is either -ve or 0. By combining the 2 stmt. we can only negate that X is not positive (due to stmt b) however still it can be -ve or 0. Hence E.

Stmt 1 - Tells us that X is either -ve or +ve. Stmt 2 - Tells us that X is either -ve or 0. By combining the 2 stmt. we can only negate that X is not positive (due to stmt b) however still it can be -ve or 0. Hence E.

Thx. goldeneagle94 for pointing a mistake in my explanation. I agree with you that option E is possible if we consider that y can be 0.And we had to consider that ?

Thx. goldeneagle94 for pointing a mistake in my explanation. I agree with you that option E is possible if we consider that y can be 0.And we had to consider that ?

I am not completely sure if we can consider a |y| to be 0.

I have a mistake when ignore y. Yes y can be 0 and from 2) x can be +ve, 0 or -ve With 1) x can be +ve or -ve together x can be +ve or -ve, not suf Hence E

Re: Is x a negative number? (1) x2 is a positive number. (2) x
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16 Jul 2018, 03:17

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