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:

right, I agree...it is given in the instructions...[M] = M/2 when M is even...i guess I am confused about the order of operations...if you do the dictated operations FIRST then you get 81...if you multiply 9 times 6 First then you get 54 which is even and then taking half you get 27 which is apparently the right answer. I think it is poorly worded or a mistake. There is nothing to indicate that you need to do the multiplication first.

I guess there are a lot of questions like this...where you get some kind of rule imposed on numbers, and i always thought that takes precedence over regular operations.

For all positive integers M, [M] = 3M when M is odd and [M] = 1/2M when M is even. Which of the following is equivalent to [9] * [6]?

Choices: A) 81 B) 54 C) 36 D) 27 E) 18

How is the answer not 81?

Shouldn't the answer be D only when choice D is [27] and not 27? Is there a mistake in the answer choices? should the choices be: A) [81] B) [54] C) [36] D) [27] E) [18]

I just did this question on a GMAT prep test, and the answer choices are in brackets, indicating that the answers themselves are subject to the function listed in the question (the function is also in brackets). So since the answer is 81, and 81 is odd, then it's answer D, because [27] means you multiply 27 by 3, which is 81. _________________

guys, the question is not asking for the result of [9] * [6], but its equivalent (which of the following answers, when multiplied by 3 or divided by 2, equals 81 too). I hope this helps.

Choices: A) 81 B) 54 C) 36 D) 27 E) 18

[9]*[6] = 27* 3 = 81

[X] = 81 SO X = 81/3 ( BECAUSE X HAS TO BE INTIGER AND 81 IS NOT DEVISIBLE BY TWO)