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.

Join my MyGuru for Free GMAT Math Refresher is the best workshop to learn about the basics and the advanced strategies required to get a 700+ GMAT score.

Working in collaboration with examPAL we will provide you with a unique online learning experience which will help you reach that higher score. Start your free 7 day trial today.

Re: What percent of the integers between 100 and 999, inclusive, [#permalink]
24 Mar 2017, 15:38

2

This post received KUDOS

Expert's post

HarveyKlaus wrote:

What percent of the integers from 100 to 999, inclusive, have all three digits the same?

(A) 1% (B) 2% (C) 3% (D) 4% (E) 5%

A nice rule says: the number of integers from x to y inclusive equals y - x + 1 999 - 100 + 1 = 900 So, there are 900 integers from 100 to 999, inclusive

Of those 900 integers, the integers with all 3 digits the same are: 111, 222, 333, 444, 555, 666, 777, 888, and 999 So, there are 9 altogether.

So, 9/900 = what percent? Well, 9/900 = 1/100 = 1%

Brent Hanneson – Creator of greenlighttestprep.com If you enjoy my solutions, you'll like my GRE prep course. Sign up for GRE Question of the Dayemails