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22 Mar 2021, 06:15
Kudos
Bookmarks
C
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:
85% (01:14) correct
15%
(00:56)
wrong
based on 60
sessions
History
Date
Time
Result
Not Attempted Yet
If (m + 3) is an even integer, which of the following is always an odd integer?
A 5m + 19
B (m + 3)/2
C 2m + 7
D m + 1
E (m + 3)(m + 4)
A 5m + 19
B (m + 3)/2
C 2m + 7
D m + 1
E (m + 3)(m + 4)
22 Mar 2021, 06:19
Kudos
Bookmarks
Bunuel
m+3 = even
i.e. m = ODD
A 5m + 19 = 5*Odd + 19 = Odd + Odd = Even
B (m + 3)/2 = (odd + 3)/2 = Even/2 = Integer (but may be even or odd both)
C 2m + 7 = 2*odd + 7 = Even + odd = ODD
D m + 1
E (m + 3)(m + 4)
ANswer: Option C
23 Mar 2021, 09:34
Kudos
Bookmarks
Bunuel
(m+3)= Even so 'm' has to be even in order to make m+3 even here.
We can effectively substitute numbers since the expressions aren't very complex.
Let m=1/3.. IMO C will always be odd.
