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29 Feb 2020, 02:40
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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:
55%
(hard)
Question Stats:
60% (02:10) correct
40%
(01:51)
wrong
based on 85
sessions
History
Date
Time
Result
Not Attempted Yet
If ab+c = even, then which of the following must be even?
I) ac+b
II) bc+a
III) a*b*c
A) I only
B) II only
C) I and II only
D) III
E) None of them
Source; www.GMATinsight.com
I) ac+b
II) bc+a
III) a*b*c
A) I only
B) II only
C) I and II only
D) III
E) None of them
Source; www.GMATinsight.com
Archit3110
29 Feb 2020, 03:07
Kudos
Bookmarks
for following of the cases the condition ab+c = even stand true
1. both a&b are odd and c is odd
2. both a&b are even and c is even
3. either of a&b is even and odd ; and c is even
MUST BE TRUE
option 1; ac+b ; ( e*e+e) ; yes ; ( e*e+o) no
option 2; bc+a ; ( e*e+e); yes ; ( e*e+o) no
option 3; a*b*c ; ( e*e*e) ; yes ; ( o*o*o) no
IMO E: NONE
1. both a&b are odd and c is odd
2. both a&b are even and c is even
3. either of a&b is even and odd ; and c is even
MUST BE TRUE
option 1; ac+b ; ( e*e+e) ; yes ; ( e*e+o) no
option 2; bc+a ; ( e*e+e); yes ; ( e*e+o) no
option 3; a*b*c ; ( e*e*e) ; yes ; ( o*o*o) no
IMO E: NONE
GMATinsight
