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24 Nov 2015, 10:52
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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:
15%
(low)
Question Stats:
79% (01:27) correct
21%
(01:19)
wrong
based on 1026
sessions
History
Date
Time
Result
Not Attempted Yet
If m/7 is an integer, then each of the following must be an integer EXCEPT
A. (m - 28)/7
B. (m + 21)/7
C. 14m/98
D. (m^2 - 49)/49
E. (m + 14)/14
PS21162
A. (m - 28)/7
B. (m + 21)/7
C. 14m/98
D. (m^2 - 49)/49
E. (m + 14)/14
PS21162
24 Nov 2015, 10:58
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Bunuel
The question says "each of the following must be an integer EXCEPT"
So, if we can find an instance where an answer choice is NOT an integer, then that will be the correct answer.
Given: m/7 is an integer
So, m could equal 7
Now plug m = 7 into the answer choices:
A. (7 - 28)/7 = -3. This is an integer
B. (7 + 21)/7 = 4. This is an integer
C. 14(7)/98 = 1. This is an integer
D. (7^2 - 49)/49 = 0. This is an integer
E. (7 + 14)/14 = 3/2. This is NOT an integer
Answer: E
Cheers,
Brent
General Discussion
16 Mar 2016, 01:07
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Here just by distributing the denominator over the numerator we can easily arrive on E as the answer
