Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

A and B must be even. (Cause if A is odd and B is even, you will not get an integer.) So, go through the answer choices.

1) Even/2 is even 4/2= 2
2) Even/2 is even again
4) A is already even, so not the answer
5) B is already even, so not the answer.

Which leaves us to C. Remember, when playing odd and even, choosing numbers doesn't always work. If you pick A=10, B=14; then (10+14)/2= 12. And then you're confused.

Look on the number line... 10 . 11 . 12 . 13. 14, the middle number if 12.

But if you choose A=2, B=4.
Look on the number line.. 2 . 3 . 4.. the middle number if 3;
so (2+4)/2 = 3 which is odd.

Remember how to choose numbers in PS and DS will definately help you. Don't choose random numbers, know what you are trying to prove.

I think this problem should be addressed in more structured way:

a/b = even => a = even (it does not matter whether b is odd or even, a will always be even)

a-b = even => There are only two possibilities:
a= odd & b = odd OR a= even & b = even

Considering both statements, we can conclude that a and b both should be even.

Now pick numbers, but while picking the numbers, also check that it satisfy the original statements given in the question. For example, we can not select a = 10 and b = 14. Because although both of them are even, they do not satisfy the first statment a/b = even.

a = 2, 4, 6, ,8, 10, 12.......
b = 2, 4, 6, 8, 10, 12.......

Now find few possible pairs of a and b. (2,2) is not possible (does not satisfy the given equation)

possible pairs could be (4,2), (8, 2), (8,4), (12,2), (12,6)

Now check each answer choice. Only choice 3 can become ODD and that too NOT ALWAYS. Because if a = 8, b = 4, then a+b/2 = 6(even).

So I think the question should probably be worded as "which of the following COULD BE ODD". If it is "which of the following MUST BE ODD" then I guess none of the choices meet the criteria.

I did not skip your post. I was just trying to address the problem in more procedural way. I understand whet you tried to say in your post. And I think I missed the point you were trying to make (in hurry..). This resulted in long and unnecessary method.

I think that the question is missing additional information.

Today, 1st year Rotman students had a great simulation event hosted by Scotiabank, one of Canada’s best and largest banks. Attended by entire Rotman 1st year students, the...

Nope. I never learned finance ever in my life until I came to Rotman. This is why I got really frustrated when this term started because I was certain...