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.

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:

Re: If x and y are odd integers, which of the following must always be a [#permalink]

Show Tags

19 Aug 2016, 05:05

Top Contributor

Bunuel wrote:

If x and y are odd integers, which of the following must always be a non-integer?

A. xy B. x/y C. y/x D. xy/2 E. -xy

Another approach:

The key word is MUST. So, if we can find an example where the expression evaluates to be an integer, we can ELIMINATE that answer choice.

A) xy: (1)(1) = 1 and 1 is an integer. ELIMINATE B. x/y: 1/1 = 1 and 1 is an integer. ELIMINATE C. y/x: 1/1 = 1 and 1 is an integer. ELIMINATE D. xy/2 E. -xy: -(1)(1) = -1 and -1 is an integer. ELIMINATE

By the process of elimination, the correct answer is

Re: If x and y are odd integers, which of the following must always be a [#permalink]

Show Tags

18 Nov 2017, 16:58

1

Hi All,

We're told that X and Y are ODD integers. We're asked which of the following will always be a NON-INTEGER. This question can be solved by TESTing VALUES.