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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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 briggs@encompasserve.org Posts: 404 Registered: 12/6/04
Re: make 100 by using 1, 7, 7, 7, 7
Posted: Nov 13, 2007 12:14 PM

In article <fhcl1n\$1gp\$1@agate.berkeley.edu>, magidin@math.berkeley.edu (Arturo Magidin) writes:
> David W. Cantrell <DWCantrell@sigmaxi.net> wrote:

>>7 x 7 + 7 + 7 + 1
>
> Using the usual precedence of operations, you have that this is equal
> to (7x7) + 7 + 7 + 1, which comes out to 64.
>
> I can't come up with any way to associate them to get 100, though:
>
> [7 x (7+7)] + 7 + 1 = 106
> [7 x (7+7+7)] + 1 = 148
> 7 x (7 + 7 + 7 + 1) = 154
>
> So... how did you get 100?

Octal?

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