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:

I have this formula I ended up deriving after encountering couple of problems like this one, here it goes:

Setp 1: Make places for as many number of digits as the number of zero's after 1.
Setp 2: The first digit is the number of zeros after 1.
Setp 3: Then rest of the digits are zero.
Setp 4: Add one to this number if your upper range number is included in the count.

So total number of zero's between 1 and 1000, inclusive, is 301.

This count formula also works for all other digits except you don't do the Step #4. Of course, this formula has certain rules if your range doesn't end at a number that has 1 and tailing zeros. Which I'll mention some other time when I have more time at hand.

----------

Another way.

(# of zeros) * (Upper Range/10) [+ 1] = total number of 1's in the range
where [+ 1] is optional depending on your upper limit.

Hello everyone! Researching, networking, and understanding the “feel” for a school are all part of the essential journey to a top MBA. Wouldn’t it be great... ...

Are you interested in applying to business school? If you are seeking advice about the admissions process, such as how to select your targeted schools, then send your questions...