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If a, b, and c are integers, is (a − b − c) even? (1) a and b are even

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If a, b, and c are integers, is (a − b − c) even? (1) a and b are even  [#permalink]

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New post 24 Sep 2018, 05:08
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

65% (01:11) correct 35% (00:57) wrong based on 37 sessions

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Re: If a, b, and c are integers, is (a − b − c) even? (1) a and b are even  [#permalink]

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New post 24 Sep 2018, 07:12
If a, b, and c are integers, is (a − b − c) even?

(1) a and b are even and c is odd.
So even-even-odd will be odd
Ans is NO
Sufficient

(2) a, b and c are consecutive integers.
If three are consecutive integers, two ways..
1) even,odd,even
Then even-even-odd will be odd
2) odd,even,odd
Then odd-even-odd will be even
Insufficient

A
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: If a, b, and c are integers, is (a − b − c) even? (1) a and b are even &nbs [#permalink] 24 Sep 2018, 07:12
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If a, b, and c are integers, is (a − b − c) even? (1) a and b are even

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