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Math quiz [solved]

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  • A AspDotNetDev

    (4 - 1 / 2) * (5 + 3)

    [Forum Guidelines]

    W Offline
    W Offline
    William Winner
    wrote on last edited by
    #31

    nice!

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    • S Sandeep Mewara

      Mustafa Ismail Mustafa wrote:

      parenthesis are free to control the order of evaluation

      ((2(3+5))*(2/1)) - 4 :rolleyes: UPDATE: [(2){3*5+1}]-4 :mad: on self... UPDATE 2: This looks good.... (5+3)*(4-(1/2)) derived from 28=56/2=8*7/2.....

      modified on Friday, October 15, 2010 2:45 PM

      W Offline
      W Offline
      William Winner
      wrote on last edited by
      #32

      you used 2 twice

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      • A AspDotNetDev

        (4 - 1 / 2) * (5 + 3)

        [Forum Guidelines]

        I Offline
        I Offline
        Ian Shlasko
        wrote on last edited by
        #33

        Ahhh, I was trying to avoid fractions... Didn't think of doing it that way... Well done.

        Proud to have finally moved to the A-Ark. Which one are you in?
        Author of the Guardians Saga (Sci-Fi/Fantasy novels)

        A 1 Reply Last reply
        0
        • M Mustafa Ismail Mustafa

          OK, let's see if you guys can work this one out :) The numbers: 1, 2, 3, 4, 5 and the operations +, -, *, / can be used in any order (parenthesis are free to control the order of evaluation) All the preceding mentioned numbers and operations can be used in any order once and only once to provide the result of 28. Remember, each of the operations can be used once only and each of the numbers can be used once only. You have to use them all to achieve your goal. You may begin :) [solution] Credited to aspdotnetdev (4 - (1/2)) * (5 + 3) = 28. Points awarded. Would you like me to make this a feature? Sorta like the CCC but for us more Mathematically as opposed to being "constantly high on peyote in order to be able to answer the CCC"?

          If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

          modified on Friday, October 15, 2010 2:52 PM

          A Offline
          A Offline
          AspDotNetDev
          wrote on last edited by
          #34

          That was fun... thanks! :thumbsup:

          [Forum Guidelines]

          L 1 Reply Last reply
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          • S Sandeep Mewara

            Mustafa Ismail Mustafa wrote:

            parenthesis are free to control the order of evaluation

            ((2(3+5))*(2/1)) - 4 :rolleyes: UPDATE: [(2){3*5+1}]-4 :mad: on self... UPDATE 2: This looks good.... (5+3)*(4-(1/2)) derived from 28=56/2=8*7/2.....

            modified on Friday, October 15, 2010 2:45 PM

            H Offline
            H Offline
            Henry Minute
            wrote on last edited by
            #35

            That is very cunning. We'll have to wait for the word from the East to see if it's within the rules. :) [Edit] Just noticed the double 2's, forget everything I said. Cheater. ;P [/Edit]

            Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.”

            S 1 Reply Last reply
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            • A AspDotNetDev

              That was fun... thanks! :thumbsup:

              [Forum Guidelines]

              L Offline
              L Offline
              leppie
              wrote on last edited by
              #36

              Giving up so soon?

              xacc.ide
              IronScheme - 1.0 RC 1 - out now!
              ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

              M A 2 Replies Last reply
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              • S Sandeep Mewara

                Mustafa Ismail Mustafa wrote:

                parenthesis are free to control the order of evaluation

                ((2(3+5))*(2/1)) - 4 :rolleyes: UPDATE: [(2){3*5+1}]-4 :mad: on self... UPDATE 2: This looks good.... (5+3)*(4-(1/2)) derived from 28=56/2=8*7/2.....

                modified on Friday, October 15, 2010 2:45 PM

                L Offline
                L Offline
                leppie
                wrote on last edited by
                #37

                Now you forgot the / and you have an extra *

                xacc.ide
                IronScheme - 1.0 RC 1 - out now!
                ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                1 Reply Last reply
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                • H Henry Minute

                  That is very cunning. We'll have to wait for the word from the East to see if it's within the rules. :) [Edit] Just noticed the double 2's, forget everything I said. Cheater. ;P [/Edit]

                  Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.”

                  S Offline
                  S Offline
                  Sandeep Mewara
                  wrote on last edited by
                  #38

                  I corrected it.. I still stand for approval as... ;)

                  1 Reply Last reply
                  0
                  • I Ian Shlasko

                    Ahhh, I was trying to avoid fractions... Didn't think of doing it that way... Well done.

                    Proud to have finally moved to the A-Ark. Which one are you in?
                    Author of the Guardians Saga (Sci-Fi/Fantasy novels)

                    A Offline
                    A Offline
                    AspDotNetDev
                    wrote on last edited by
                    #39

                    Yeah, I came to the conclusion that it was going to be some weird fraction like that. I decided that it was probably going to involve a divide by one (when I removed the divide and 1 from the possibilities, the subset didn't seem to be possible) or divide by 2, and since there is only one division, I figured it would probably be hard to balance that out with a multiply. Got my calculator out, divided 28 by 8, then tried to figure out ways to get to 3.5. I got lucky. :)

                    [Forum Guidelines]

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                    • A AspDotNetDev

                      (4 - 1 / 2) * (5 + 3)

                      [Forum Guidelines]

                      M Offline
                      M Offline
                      Mustafa Ismail Mustafa
                      wrote on last edited by
                      #40

                      There we go! :-D Congratulations man, you get the points for today.

                      If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                      A 1 Reply Last reply
                      0
                      • L leppie

                        Giving up so soon?

                        xacc.ide
                        IronScheme - 1.0 RC 1 - out now!
                        ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                        A Offline
                        A Offline
                        AspDotNetDev
                        wrote on last edited by
                        #41

                        Haha, no, I posted my solution above.

                        [Forum Guidelines]

                        1 Reply Last reply
                        0
                        • L leppie

                          Giving up so soon?

                          xacc.ide
                          IronScheme - 1.0 RC 1 - out now!
                          ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                          M Offline
                          M Offline
                          Mustafa Ismail Mustafa
                          wrote on last edited by
                          #42

                          He got it. (4 - (1/2)) * (5 + 3) = 28

                          If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                          A L 2 Replies Last reply
                          0
                          • M Mustafa Ismail Mustafa

                            He got it. (4 - (1/2)) * (5 + 3) = 28

                            If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                            A Offline
                            A Offline
                            AspDotNetDev
                            wrote on last edited by
                            #43

                            Nice timing! When I posted my reply, it appeared before yours... but yours did indeed appear before I did a refresh! I think you posted only milliseconds after my post. :)

                            [Forum Guidelines]

                            1 Reply Last reply
                            0
                            • S SinghUlarity

                              While we kill ourselves over this problem, Mustafa is out somewhere enjoying his weekend. This is all a set-up :suss:

                              I are n00b.

                              M Offline
                              M Offline
                              Mustafa Ismail Mustafa
                              wrote on last edited by
                              #44

                              :laugh: Not quite, but since I suck ass at DD's CCC, I thought I could do something I'm good at. Driving everyone else insane Giving everyone some good, clean, math based fun :)

                              If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                              1 Reply Last reply
                              0
                              • M Mustafa Ismail Mustafa

                                He got it. (4 - (1/2)) * (5 + 3) = 28

                                If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                                L Offline
                                L Offline
                                leppie
                                wrote on last edited by
                                #45

                                3 1/2 was an option but I didn't explore it, I thought for some reason it was not reachable... :(

                                xacc.ide
                                IronScheme - 1.0 RC 1 - out now!
                                ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                                1 Reply Last reply
                                0
                                • M Mustafa Ismail Mustafa

                                  There we go! :-D Congratulations man, you get the points for today.

                                  If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                                  A Offline
                                  A Offline
                                  AspDotNetDev
                                  wrote on last edited by
                                  #46

                                  And I only had to be wrong 2 or 3 times before I finally got it right. ;P

                                  [Forum Guidelines]

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                                  • L leppie

                                    Practice on Fermat's Last Theorem then ;P

                                    xacc.ide
                                    IronScheme - 1.0 RC 1 - out now!
                                    ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                                    A Offline
                                    A Offline
                                    AspDotNetDev
                                    wrote on last edited by
                                    #47

                                    I already figured that one out. But I didn't have enough room on my notepad to write down the full proof. :((

                                    [Forum Guidelines]

                                    L 1 Reply Last reply
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                                    • A AspDotNetDev

                                      I already figured that one out. But I didn't have enough room on my notepad to write down the full proof. :((

                                      [Forum Guidelines]

                                      L Offline
                                      L Offline
                                      leppie
                                      wrote on last edited by
                                      #48

                                      Same here, was just too big for a Tweet :(

                                      xacc.ide
                                      IronScheme - 1.0 RC 1 - out now!
                                      ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition

                                      1 Reply Last reply
                                      0
                                      • M Mustafa Ismail Mustafa

                                        OK, let's see if you guys can work this one out :) The numbers: 1, 2, 3, 4, 5 and the operations +, -, *, / can be used in any order (parenthesis are free to control the order of evaluation) All the preceding mentioned numbers and operations can be used in any order once and only once to provide the result of 28. Remember, each of the operations can be used once only and each of the numbers can be used once only. You have to use them all to achieve your goal. You may begin :) [solution] Credited to aspdotnetdev (4 - (1/2)) * (5 + 3) = 28. Points awarded. Would you like me to make this a feature? Sorta like the CCC but for us more Mathematically as opposed to being "constantly high on peyote in order to be able to answer the CCC"?

                                        If the post was helpful, please vote, eh! Current activities: Playing Star Craft II. Don't bother me, eh? Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

                                        modified on Friday, October 15, 2010 2:52 PM

                                        N Offline
                                        N Offline
                                        NormDroid
                                        wrote on last edited by
                                        #49

                                        Mustafa Ismail Mustafa wrote:

                                        Would you like me to make this a feature? Sorta like the CCC but for us more Mathematically as opposed to being "constantly high on peyote in order to be able to answer the CCC"?

                                        Yes please, we need a break from CCC.

                                        Software Kinetics - Moving Software

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                                        0
                                        • A AspDotNetDev

                                          (4 - 1 / 2) * (5 + 3)

                                          [Forum Guidelines]

                                          L Offline
                                          L Offline
                                          leonej_dt
                                          wrote on last edited by
                                          #50

                                          Nicely done. Thinking out of the box! --- I had correctly proved there was not a solution whose intermediate results were all integer. From that point, I made the wrong conclusion there was no solution at all.

                                          Eduardo León

                                          A 1 Reply Last reply
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