Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: numerical challenge, part 2
Replies: 2   Last Post: Nov 2, 2012 6:13 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Phil Carmody

Posts: 2,219
Registered: 12/7/04
Re: numerical challenge, part 2
Posted: Nov 2, 2012 6:13 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Ben Bacarisse <ben.usenet@bsb.me.uk> writes:
> I know this is now an old post but a recent reply made me look again...
>
> Phil Carmody <thefatphil_demunged@yahoo.co.uk> writes:

> > eric.jacobsen@ieee.org (Eric Jacobsen) writes:
> >> On Tue, 30 Oct 2012 19:50:19 -0700, William Elliot <marsh@panix.com>
> >> wrote:
> >>

> >> >On Tue, 30 Oct 2012, RichD wrote:
> >> >

> >> >> What is the sum of the digits of 3 ^ 1000?
> >> >
> >> >The sum of the base 3 digits of 3^1000 is 1.

> >
> > True.
> >

> >> >The sum of the base 9 digits of 3^1000 is 1.
> >>
> >> That's clever. If I were interviewing, asked this question, and got
> >> this answer I'd be favorably impressed.

> >
> > Nope, it's 3.
> >
> > 3^1=3
> > 3^2=10
> > 3^3=30
> > 3^4=100
> > 3^5=3000
> > 3^6=10000
> > 3^7=30000
> > 3^8=100000
> > 3^10=300000

>
> It looks like you've added a 0 from 3^5 upwards.


Good catch. I was getting a bit bored by that stage, as you can imagine.

Phil
--
Regarding TSA regulations:
How are four small bottles of liquid different from one large bottle?
Because four bottles can hold the components of a binary liquid explosive,
whereas one big bottle can't. -- camperdave responding to MacAndrew on /.



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.