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Posts: 1
Updated on: 09 Jul 2014, 07:46
Originally posted by DelGiudice99 on 09 Jul 2014, 07:36.
Last edited by Bunuel on 09 Jul 2014, 07:46, edited 1 time in total.
Last edited by Bunuel on 09 Jul 2014, 07:46, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to DS forum.
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
80% (00:38) correct
20%
(00:43)
wrong
based on 104
sessions
History
Date
Time
Result
Not Attempted Yet
Is x > 0 ?
(1) -2x < 0
(2) x^3 > 0
(1) -2x < 0
(2) x^3 > 0
Correct Answer: D
---
This problem has drove me crazy. I cannot see how the answer is D.
Even from the two statements, x could still be anything.
For statement 1: if x was lets say, -2, the statement would be false. So right off the bat the first statement is insufficient.
For statement 2: take that same -2 and you also have an insufficient answer, -27 is not greater than 0.
I picked E and was marked wrong. This leads me to believe either I am not seeing something or the site is not credible.
They do have a disclaimer stating * GMAT is a registered trademark of the Graduate Management Admission Council, which was not involved in the production of, and does not endorse, this product.
On majortest . com- Test 1, question 6, data sufficiency
---
This problem has drove me crazy. I cannot see how the answer is D.
Even from the two statements, x could still be anything.
For statement 1: if x was lets say, -2, the statement would be false. So right off the bat the first statement is insufficient.
For statement 2: take that same -2 and you also have an insufficient answer, -27 is not greater than 0.
I picked E and was marked wrong. This leads me to believe either I am not seeing something or the site is not credible.
They do have a disclaimer stating * GMAT is a registered trademark of the Graduate Management Admission Council, which was not involved in the production of, and does not endorse, this product.
On majortest . com- Test 1, question 6, data sufficiency
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
DelGiudice99
Is x > 0 ?
(1) -2x < 0 --> reduce by -2 and flip the sign since dividing by negative value: x > 0. Sufficient.
(2) x^3 > 0. Take the cube root: x > 0. Sufficient.
Answer: D.
This is sub-500 question. You need to brush fundamentals.
Check the following links:
ALL YOU NEED FOR QUANT: all-you-need-for-quant-140445.html
Theory on Inequalities:
Solving Quadratic Inequalities - Graphic Approach: solving-quadratic-inequalities-graphic-approach-170528.html
inequalities-trick-91482.html
data-suff-inequalities-109078.html
range-for-variable-x-in-a-given-inequality-109468.html
everything-is-less-than-zero-108884.html
graphic-approach-to-problems-with-inequalities-68037.html
All DS Inequalities Problems to practice: search.php?search_id=tag&tag_id=184
All PS Inequalities Problems to practice: search.php?search_id=tag&tag_id=189
700+ Inequalities problems: inequality-and-absolute-value-questions-from-my-collection-86939.html
Solving Quadratic Inequalities - Graphic Approach: solving-quadratic-inequalities-graphic-approach-170528.html
inequalities-trick-91482.html
data-suff-inequalities-109078.html
range-for-variable-x-in-a-given-inequality-109468.html
everything-is-less-than-zero-108884.html
graphic-approach-to-problems-with-inequalities-68037.html
All DS Inequalities Problems to practice: search.php?search_id=tag&tag_id=184
All PS Inequalities Problems to practice: search.php?search_id=tag&tag_id=189
700+ Inequalities problems: inequality-and-absolute-value-questions-from-my-collection-86939.html
Inequalities - Tips and hints: tips-and-hints-for-specific-quant-topics-with-examples-172096.html#p1379270
P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention to rules 2, 3, and 7. Thank you.
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(1) For the negative value of x in the first statement x>0 is possible.
(2) For the positive value of x in the second statement x>o is possible.
(2) For the positive value of x in the second statement x>o is possible.
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