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If a and b are both even integers, which of the following

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shreerajp99
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If a and b are both even integers, which of the following [#permalink] New post   Updated on: 06 Apr 2013, 04:57
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If a and b are both even integers, which of the following must be true?

A. The product of a and b is odd
B. The sum of a and b is odd
C. a - b > 0
D. a raised to the b power is even
E. (a + b)/4 is even

I know the answer but my question is why? Since zero is an even integer,if we consider 2^0->1 and thus D cant be always true.
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D

Originally posted by shreerajp99 on 06 Apr 2013, 04:47.
Last edited by Bunuel on 06 Apr 2013, 04:57, edited 2 times in total.
Renamed the topic and edited the question.
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Re: If a and b are both even integers, which of the following [#permalink] New post   06 Apr 2013, 05:02
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shreerajp99 wrote:
If a and b are both even integers, which of the following must be true?

A. The product of a and b is odd
B. The sum of a and b is odd
C. a - b > 0
D. a raised to the b power is even
E. (a + b)/4 is even

I know the answer but my question is why? Since zero is an even integer,if we consider 2^0->1 and thus D cant be always true.


You are right, D cannot be the correct answer: 2^0=1=odd. So, none of the options must be true.

I guess the question should read "if a and b are both positive even integers..."
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shreerajp99
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Re: If a and b are both even integers, which of the following [#permalink] New post   06 Apr 2013, 10:00
Bunuel,does this mean 800score tests questions are not upto the mark?I took one of their quant tests today and got 31/37.Do u think their questions are a fair indicator of my actual level?

Thanks,
Shreeraj
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Re: If a and b are both even integers, which of the following [#permalink] New post   06 Apr 2013, 20:41
I have seen some good comments on 800score in MGMAT forums. But this question is definitely a bad one.
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Re: If a and b are both even integers, which of the following [#permalink] New post   07 Apr 2013, 22:57
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shreerajp99 wrote:
Bunuel,does this mean 800score tests questions are not upto the mark?I took one of their quant tests today and got 31/37.Do u think their questions are a fair indicator of my actual level?

Thanks,
Shreeraj


I've seen decent questions from 800score, so I wouldn't discard this source based only one question.
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Re: PS-Must Be True- 2 [#permalink] New post   23 Mar 2020, 04:04
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: PS-Must Be True- 2 [#permalink]
23 Mar 2020, 04:04
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