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# Data sufficiency - Absolute values

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Intern
Joined: 22 Mar 2018
Posts: 4
Data sufficiency - Absolute values  [#permalink]

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26 Mar 2018, 05:24
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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The question is
Is M<0?
? −? = |?|
? ?2 = 9

Explanation:
Statement (1) by itself is not sufficient. From statement (1), M is either a negative number or zero. If M=-3, then –(-3)=|-3| or 3=3, which is not sufficient.

I do not understand because
when M>0, lMl = M ≠ - M so the statement (1) alone seems sufficient

Math Expert
Joined: 02 Sep 2009
Posts: 50009
Re: Data sufficiency - Absolute values  [#permalink]

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26 Mar 2018, 05:34
1
HIUY wrote:
The question is
Is M<0?
? −? = |?|
? ?2 = 9

Explanation:
Statement (1) by itself is not sufficient. From statement (1), M is either a negative number or zero. If M=-3, then –(-3)=|-3| or 3=3, which is not sufficient.

I do not understand because
when M>0, lMl = M ≠ - M so the statement (1) alone seems sufficient

Discussed here: https://gmatclub.com/forum/is-m-0-1-m-m-2-m-99913.html

LOCKING THE TOPIC.
_________________
Re: Data sufficiency - Absolute values &nbs [#permalink] 26 Mar 2018, 05:34
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