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28 Mar 2018, 23:51
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
85% (00:40) correct
15%
(00:32)
wrong
based on 388
sessions
History
Date
Time
Result
Not Attempted Yet
GMAT CLUB TESTS' FRESH QUESTION.
What is the value of |m - n|?
(1) n^2 = 36
(2) m^2 = 81
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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
29 Mar 2018, 01:37
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Bunuel
(1) n^2 = 36 ... Hence n = +6 or -6. Since we do not know what m is Insuff
(2) We do not know what n is. Insuff
(1) + (2) ... n = +6 or - 6.... m = +9 or -9
m-n = +15,-15,3,-3
|m-n| = 15 or 3
So (1) + (2) is Insuff
Hence Option (E) is our answer.
Best,
Gladi
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30 Mar 2018, 11:27
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Bunuel
(1) n^2 = 36
n = 6 or -6
No info about m
Insufficient
(2) m^2 = 81
m = 9 or -9
No info about m
Insufficient
Combine both 1 & 2
Let n =6 & m = 9....|m - n| = |9 - 6| = 3
Let n =6 & m = -9....|m - n| = |-9 - 6| = 15
Two different answers
Insufficient
Answer: E
