OT A simple math puzzle « Next Oldest | Next Newest »

 ▼ Ken Ratkevich Junior Member Posts: 46 Threads: 15 Joined: Sep 2006 05-06-2007, 12:11 PM The solution to this puzzle is probably very simple. I will probably be embarrassed by how simple the solution actually is. Ken ▼ Matt Kernal Senior Member Posts: 267 Threads: 27 Joined: Jul 2005 05-06-2007, 12:22 PM On first glance, 15 seems about right (i.e. 36 minus 21 = 15 and 28 minus 15 = 13). Edited: 6 May 2007, 12:27 p.m. ▼ Chuck Senior Member Posts: 320 Threads: 59 Joined: Dec 2006 05-06-2007, 12:33 PM How does the 21 - 13 give 7, then? Edited: 6 May 2007, 12:34 p.m. ▼ Matt Kernal Senior Member Posts: 267 Threads: 27 Joined: Jul 2005 05-06-2007, 01:28 PM Good catch. Obviously, I didn't take the time to finish the sequence :-) Good thing my answer was of the non-committal type, with generous use of "escape" language, such as, "On first glance.." and "seems about right..". Now I'm sounding like a politician :-) Matt Richard Ottosen Member Posts: 76 Threads: 3 Joined: Jun 2007 05-06-2007, 01:03 PM One solution is 12. I wonder if there are more solutions. :-) -- Richard ▼ Ken Ratkevich Junior Member Posts: 46 Threads: 15 Joined: Sep 2006 05-06-2007, 04:21 PM Hi, Can you describe how you arrived at your solution? Ken ▼ Gerson W. Barbosa Posting Freak Posts: 2,761 Threads: 100 Joined: Jul 2005 05-06-2007, 06:19 PM Ken, Perhaps Richard just didn't want to spoil the fun: ```(9+9) + (7+2) = 27 (2+7) + (4+5) = 18 (1+8) + (3+9) = 21 ``` and so on... Regards, Gerson. Edited: 6 May 2007, 6:34 p.m. ▼ Richard Ottosen Member Posts: 76 Threads: 3 Joined: Jun 2007 05-06-2007, 08:08 PM Ken: I used the same method to get the solution as Gerson. I summed the individual digits to get the next result. Puzzles like this one always make me wonder if there is more than one way to solve them since the rules are very open-ended. Thanks for the challenge. -- Richard ▼ Gerson W. Barbosa Posting Freak Posts: 2,761 Threads: 100 Joined: Jul 2005 05-06-2007, 10:58 PM Quote: I used the same method to get the solution as Gerson. As a matter of fact, I didn't find the solution. You did. I just got curious and tried to discover how you had found it. If I didn't know the solution beforehand I would have probably voted for 15 and assumed the 21 at right was a typo :-) The following might be easy and has only one solution, to my knowledge: ``` ____ ___ |\/| \ / \ / |\/| ? | | _\/_ /_\ |¯¯| ``` Gerson. ▼ Valentin Albillo Posting Freak Posts: 1,755 Threads: 112 Joined: Jan 2005 05-07-2007, 02:33 AM Yes, this one is very, very old: ``` ----- _|_ | | ----- ``` Best regards from V. ▼ Antonio Maschio (Italy) Senior Member Posts: 416 Threads: 78 Joined: Mar 2006 05-07-2007, 05:39 AM Please, explain... -- Antonio ▼ Valentin Albillo Posting Freak Posts: 1,755 Threads: 112 Joined: Jan 2005 05-07-2007, 06:17 AM Hi, Antonio: Antonio posted: "Please, explain..." It's actually extremely simple: the first four forms are just the ASCII representation of the shape of the digits 1,2,3, and 4 with their mirror images prepended. The next element thus is to be an ASCII representation of the shape of a 5, with its mirror image prepended. Best regards from V. ▼ Antonio Maschio (Italy) Senior Member Posts: 416 Threads: 78 Joined: Mar 2006 05-07-2007, 11:01 AM Off! I'm so dumb... -- Antonio ▼ Gerson W. Barbosa Posting Freak Posts: 2,761 Threads: 100 Joined: Jul 2005 05-07-2007, 12:01 PM Actually this is not so easy, as we tend to see the symbols as letters: ```MVXM ``` Roman numerals? :-) Gerson. PeterP Senior Member Posts: 564 Threads: 72 Joined: Sep 2005 05-07-2007, 12:50 PM Thanks!! Cheers Peter ▼ Valentin Albillo Posting Freak Posts: 1,755 Threads: 112 Joined: Jan 2005 05-07-2007, 07:14 PM Hi, PeterP: Actually, I've got nothing (yet). I've checked the usual accounts but nothing there from you, unless you were telling me that a recently deceased relative has left me 6 million sterling pounds in his will and that I should send my bank account details for the transfer of the funds to be made. If that was the case, sorry but I decline the kind offer, I'm far too modest a person, as everyone knows, and wouldn't know what to do with that much money, it would spoil my healthy habits for sure. Now seriously, did you remember to include the string "HP CALCS" in the subject line, as instructed in my web page ? Else, *anything* sent to my usual account (via this MoHP form, for example) without including such a text string in the subject is automatically and invisibly redirected to the trash bin, sight unseen. Thanks for whatever it was and Best regards from V. ▼ PeterP Senior Member Posts: 564 Threads: 72 Joined: Sep 2005 05-07-2007, 09:27 PM my mistake, really sorry. Forgot about the subject line. Mistake corrected. Thanks for the reminder! Cheers Peter Ken Ratkevich Junior Member Posts: 46 Threads: 15 Joined: Sep 2006 05-07-2007, 04:08 AM Oh, I see now! I got off on the wrong foot since 99/72 = remainder of 27 and 54/27 = remainder of 18. I lost it after that. At least the solution was a little bit tricky. I don't need to be that embarrassed. Ken

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