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

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 dangerousgame95@gmail.com Posts: 2 Registered: 11/12/07
Re: make 100 by using 1, 7, 7, 7, 7
Posted: Nov 12, 2007 5:27 PM

On Nov 12, 5:13 pm, quasi <qu...@null.set> wrote:
> On Mon, 12 Nov 2007 22:14:03 +0100, Thomas Nordhaus
>
> <thnord2...@yahoo.de> 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?
>
> >only solution.

>
> The implication of showing four 7's is that you are supposed to use
> only those four 7's, and hence, only one 1.
>
> If you allow any number of 7's and 1's, it should be obvious that
> there are infinitely many solutions.
>
> quasi

Thank you, that's what I meant, I should have made that clear.

So anyone know of any arrangement?

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