Bunuel wrote:
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
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
7Now 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
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