4gmat : Message: Help: Counting digits problem!

4gmat · 4gmat - GMAT Online Preparation

Want to share photos of your group with the world? Add a group photo to Flickr.

Having problems with message search? Fill out this form to ensure your group is one of the first to be migrated to the new message search system.

hi everyone

Message #574 of 1650 |

Help: Counting digits problem!

Hi all,

Can any body help me in generalizing the formula for the following?

a) The number of 0’s written when you write 1 to 10000.

b) The number of 1’s written when you write 1 to 10000.

c) The number of 2’s written when you write 1 to 10000.

Please help me with this, how do we solve this kind of problems in less than a minute, any quick fix??

Thanks & Regards,

Rupesh

Fri Oct 6, 2006 8:21 am

"RUPESH KUMAR" <rupesh.kumar@...>

Offline

Message #574 of 1650 |

Expand Messages	Author	Sort by Date
hi everyone i want to know about the Powerprep cd whether it is available for GMAT like GRE Powerprep cd issued by ETS. if avialble, where u can get it???? ...	venki srini venk07_in	Oct 6, 2006 8:11 am
Hi all, Can any body help me in generalizing the formula for the following? a) The number of 0's written when you write 1 to 10000. b) The number...	RUPESH KUMAR rupniceguy	Oct 10, 2006 2:30 pm
Hello Rupesh! I think that is a combinatory approach to this kind of problem: a) Think first about numbers of 1 digit: "0" is writen 0 times * *For...	Said Boufatis frbsaid	Oct 13, 2006 2:20 pm
It's solved this way: let's take one case - number of 2's written from 1 to 10000. Since 10000 does not contain 2, so we have to consider numbers 1 to 9999. ...	Animesh Kumar animeshkum	Oct 17, 2006 7:57 am