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:

Since the answer choices are quite spread apart, we can approximate.

NOTE: This technique relies on a nice trick that can come in handy in many cases. So, I urge that you learn it (it only takes 1 minute to learn). The technique is squaring numbers that end in 5 quickly in your head. You'll find the video at the bottom of this post.

The options given makes this question easier to calculate. The unit digits of 6^6 and 4^6 both ends in 6, so the difference between them end in 0. The only logical answer choice that ends in 0 is 1040.