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Topic: make 100 by using 1, 7, 7, 7, 7
Replies: 41   Last Post: Nov 15, 2007 6:13 PM

 Messages: [ Previous | Next ]
 Jan Kristian Haugland Posts: 450 Registered: 12/13/04
Re: make 100 by using 1, 7, 7, 7, 7
Posted: Nov 13, 2007 1:43 PM

On 13 Nov, 18:46, David W. Cantrell <DWCantr...@sigmaxi.net> wrote:
> amzoti <amz...@gmail.com> wrote:
> > On Nov 13, 8:40 am, "Benjamin A. Bartsch"
> > <benjamin.a.bart...@gmail.com> wrote:

> > > dangerousgam...@gmail.com schrieb:
>
> > > > So, using only +, -, x, /, and parentheses, and ONLY these numbers:
>
> > > > 1, 7, 7, 7, 7
>
> > > > how can you make 100? Is there more than one solution?
>
> > > --> (1/7+7)*(7+7)

(...slightly annoyed about not finding this on my own...)

> > > Benjamin
>
> > So far - I think this is the only valid solution.
>
> If juxtaposition is not allowed, then it is the only valid _decimal_
> solution so far. But note that the OP did not specify the base; as such,
> I see no reason why my octal solution should not be valid also.
>
> David

No reason? I bet the cashiers in your local supermarket love
discussing price and change with you. :-)

---
J K Haugland
http://home.no.net/zamunda

Date Subject Author
11/12/07 dangerousgame95@gmail.com
11/12/07 Thomas Nordhaus
11/12/07 amzoti
11/12/07 quasi
11/12/07 dangerousgame95@gmail.com
11/13/07 magidin@math.berkeley.edu
11/12/07 Thomas Nordhaus
11/12/07 quasi
11/12/07 Joshua Cranmer
11/12/07 Raymond Manzoni
11/13/07 William Elliot
11/13/07 amzoti
11/12/07 David R Tribble
11/12/07 Nat Silver
11/12/07 Raymond Manzoni
11/12/07 Raymond Manzoni
11/13/07 benjamin.a.bartsch@gmail.com
11/13/07 amzoti
11/13/07 David W. Cantrell
11/13/07 magidin@math.berkeley.edu
11/13/07 David W. Cantrell
11/13/07 magidin@math.berkeley.edu
11/13/07 briggs@encompasserve.org
11/13/07 Robert Israel
11/13/07 Dave Seaman
11/13/07 benjamin.a.bartsch@gmail.com
11/13/07 amzoti
11/13/07 David W. Cantrell
11/13/07 Jan Kristian Haugland
11/13/07 Robert Israel
11/13/07 Kira Yamato
11/13/07 Kira Yamato
11/13/07 Robert Israel
11/13/07 amzoti
11/14/07 Thomas Nordhaus
11/15/07 Michael Press
11/14/07 Michael Press
11/15/07 Kira Yamato
11/15/07 Michael Press
11/15/07 Rick Decker
11/13/07 Raymond Manzoni