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? > > >How about this: 7+7+7+7+7+7+7+7+7+7+7+7+7+7+1+1. I think, that's the > >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.