Well Done Sandeep and Bruno !! Both of you done it very well. If I've to rank between Bruno and Sandeep, you will be ranked higher than Sandeep for your fantastic presentation. I appreciate efforts of both of you, and agree that this was much harder than previous ones. But both of you represented superb intellect. Well Done Sandeep and Bruno !
-------------------------------------------------------------------------- Thanks & Regards Ashish Jain (Excel Macros - Google Group Manager) http://www.excelitems.com (Developer of OpenXL) http://www.openexcel.com Excel,VBA,VSTO Trainer Ph. No. - 0x25402CF2B --------------------------------------------------------------------------- On Sep 10, 7:42 am, Bruno Bruno <brunobbr...@gmail.com> wrote: > Is it me, or this puzzle is (much) harder than the others?Not exactly hard > to do it, but hard to do it in a smart way. What killed me is a way to > identify Pseudo-Primes and their respective primes sum. > > Is there an easier way than simply testing all combinations of sums from a > number's primes? Because when a number has N divisors (others than itself), > there are 2^N different ways to sum them. When N >= 17 (Happens for 180, > 240, 252, 288, 300, 336, 360, 396, 420, 432, 450, 468 and 480 in the first > 500 numbers), this means 2^17 combinations -> enough to overflow my poor > computer. > > So I had to treat this numbers (all of them pseudo-primes) apart from the > general case. I believe the solution is working, but would be very pleased > to learn a "more elegant" solution. > (I also considered 0 and 1 special cases - don't know what kind of primes > definition you're using) > > Thanks for the puzzle, > Bruno > > On Wed, Sep 9, 2009 at 12:46 AM, Ashish Jain <26may.1...@gmail.com> wrote: > > Hi All, > > > This is challenge for all excel users. Solve these puzzles and sharpen your > > excel acumen. So, here goes the second puzzle of "Excel Macros Google Group" > > in the attached file. > > > *Old Puzzles:* > > Puzzle #1 - > >http://groups.google.com/group/excel-macros/browse_thread/thread/3922... > > Solved by - Harmeet Only. > > Puzzle #2 - > >http://groups.google.com/group/excel-macros/browse_thread/thread/b4d2... > > Solved by - Bruno and Sandeep > > > -------------------------------------------------------------------------- > > Thanks & Regards > > Ashish Jain > > (Excel Macros - Google Group Manager) > >http://www.excelitems.com > > (Developer of OpenXL) > >http://www.openexcel.com > > Excel,VBA,VSTO Trainer > > Ph. No. - 0x25402CF2B > > --------------------------------------------------------------------------- > > > > Puzzle #3.xls > 108KViewDownload --~--~---------~--~----~------------~-------~--~----~ ---------------------------------------------------------------------------------- Some important links for excel users: 1. Excel and VBA Tutorials(Video and Text), Free add-ins downloads at http://www.excelitems.com 2. Excel tutorials at http://www.excel-macros.blogspot.com 3. Learn VBA Macros at http://www.vbamacros.blogspot.com 4. Excel Tips and Tricks at http://exceldailytip.blogspot.com To post to this group, send email to excel-macros@googlegroups.com If you find any spam message in the group, please send an email to: Ayush Jain @ jainayus...@gmail.com or Ashish Jain @ 26may.1...@gmail.com <><><><><><><><><><><><><><><><><><><><><><> HELP US GROW !! We reach over 6,500 subscribers worldwide and receive many nice notes about the learning and support from the group. Our goal is to have 10,000 subscribers by the end of 2009. Let friends and co-workers know they can subscribe to group at http://groups.google.com/group/excel-macros/subscribe -~----------~----~----~----~------~----~------~--~---
