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hi everyone

Message #574 of 1636 |

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 1636 |

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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