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04 May 2021, 04:00
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
52% (01:58) correct
48%
(01:58)
wrong
based on 212
sessions
History
Date
Time
Result
Not Attempted Yet
If a and b are positive integers, which of the following cannot be odd?
A. (2+4a)/(4+4b)
B. (4a)/(b)
C. a/b
D. (4+a)/(2+4b)
E. (4+a)/(1+4b)
A. (2+4a)/(4+4b)
B. (4a)/(b)
C. a/b
D. (4+a)/(2+4b)
E. (4+a)/(1+4b)
08 May 2021, 01:45
Kudos
Bookmarks
Bunuel
\(\frac{2+4a}{4+4b}=\frac{2a+1}{2b+2}=\frac{odd}{even}\neq{integer}\).
Answer: A.
General Discussion
04 May 2021, 05:22
Kudos
Bookmarks
Bunuel
A. (2+4a)/(4+4b) odd divided by even can't be odd (Must be a fraction )
B. (4a)/(b) even divided by (odd/even) could be odd
C. a/b (odd/even) divided by (odd/even) could be odd
D. (4+a)/(2+4b) (odd/even) divided by even could be odd
E. (4+a)/(1+4b) (odd/even) divided by odd could be odd
A is the answer IMO
