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  3. Frogger Math [modified]

Frogger Math [modified]

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  • R Richard Blythe

    Right on my man! It's amazing how many people don't get it. This was a question that I dug out of an old college math book. (Your hired!) :)

    The mind is like a parachute. It doesn’t work unless it’s open.

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    Ennis Ray Lynch Jr
    wrote on last edited by
    #24

    Or they just realized that an infinite series or harmonic series question is Calculus 101 and is borderline pedestrian and no fun to bother with. However, considering the question involved frogs you have to consider that a Frog has a minimum non-zero jumping distance or are we in a perfect, frictionless vacuum with a frog who occupies a point in space and not a volume?

    Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. I also do Android Programming as I find it a refreshing break from the MS. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost

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    • D Dalek Dave

      I never saw a shoe fly. I saw a house fly, I saw a horse fly, but I just gone seen about ev'ry ting when I see some footwear fly!

      ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave

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      hammerstein05
      wrote on last edited by
      #25

      Dumbo!

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      • R Richard Blythe

        Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

        The mind is like a parachute. It doesn’t work unless it’s open.

        modified on Tuesday, July 20, 2010 11:33 AM

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        Marc Clifton
        wrote on last edited by
        #26

        Richard Blythe wrote:

        Question: How many jumps will it take for Frogger to reach the wall?

        2 jumps. After the first jump, an exception is thrown, the frogger reboots, and he's back to full energy. Marc

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        • M Marc Clifton

          Richard Blythe wrote:

          Question: How many jumps will it take for Frogger to reach the wall?

          2 jumps. After the first jump, an exception is thrown, the frogger reboots, and he's back to full energy. Marc

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          Richard Blythe
          wrote on last edited by
          #27

          Marc Clifton wrote:

          an exception is thrown

          Oh yes, I use that exception all the time: FroggerEnergyException

          The mind is like a parachute. It doesn’t work unless it’s open.

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          • R Richard Blythe

            Allways remmber to spel your wordds write. :-D

            The mind is like a parachute. It doesn’t work unless it’s open.

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            TheyCallMeMrJames
            wrote on last edited by
            #28

            Potayto potahto. ;)

            They Call me Mister James

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            • R Richard Blythe

              Right on my man! It's amazing how many people don't get it. This was a question that I dug out of an old college math book. (Your hired!) :)

              The mind is like a parachute. It doesn’t work unless it’s open.

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              TheyCallMeMrJames
              wrote on last edited by
              #29

              Richard Blythe wrote:

              Your hired

              Hey spelling cop! It's "you're hired". ;) hehehe Don't go writing up a grammar checker, okay? hehe

              They Call me Mister James

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              • S Steven J Jowett

                Frogger is an infinate number of jumps from the wall, because, given enough decimal places, any positive finate number divided by 2 will always produce a value greater that zero.

                Steve Jowett ------------------------- Real Programmers don't need comments -- the code is obvious.

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                Chris Losinger
                wrote on last edited by
                #30

                all he has to do is get close and then lean over a bit. or, get a bit closer and let one of the electrons in one of the cells in his skin bump into one of the electrons in the silica in the wall. you can't get infinitely-close-but-not-touching in the real world.

                image processing toolkits | batch image processing

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                • T TheyCallMeMrJames

                  Richard Blythe wrote:

                  Your hired

                  Hey spelling cop! It's "you're hired". ;) hehehe Don't go writing up a grammar checker, okay? hehe

                  They Call me Mister James

                  R Offline
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                  Richard Blythe
                  wrote on last edited by
                  #31

                  I'm hit! :laugh:

                  The mind is like a parachute. It doesn’t work unless it’s open.

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                  • R Robert Rohde

                    Well thats a long tongue :laugh:

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                    Steve Mayfield
                    wrote on last edited by
                    #32

                    Even the fly would stick around for one that long :laugh: especially if it was a female :-O

                    Steve _________________ I C(++) therefore I am

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                    • R Richard Blythe

                      Right on my man! It's amazing how many people don't get it. This was a question that I dug out of an old college math book. (Your hired!) :)

                      The mind is like a parachute. It doesn’t work unless it’s open.

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                      Chris Losinger
                      wrote on last edited by
                      #33

                      Richard Blythe wrote:

                      I dug out of an old college math book.

                      old... no foolin. like 490 BC[^] old.

                      image processing toolkits | batch image processing

                      modified on Tuesday, July 20, 2010 1:10 PM

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                      • D David Crow

                        Richard Blythe wrote:

                        Question: How many jumps will it take for Frogger to reach the wall?

                        He'll never get there.

                        "One man's wage rise is another man's price increase." - Harold Wilson

                        "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

                        "Man who follows car will be exhausted." - Confucius

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                        Luc Pattyn
                        wrote on last edited by
                        #34

                        Correct. After his first jump, the fly is out of there and the Frogger is no longer interested in nearing the wall. :)

                        Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

                        Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

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                        • C Chris Losinger

                          Richard Blythe wrote:

                          I dug out of an old college math book.

                          old... no foolin. like 490 BC[^] old.

                          image processing toolkits | batch image processing

                          modified on Tuesday, July 20, 2010 1:10 PM

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                          Uros Calakovic
                          wrote on last edited by
                          #35

                          Zeno's paradoxes[^] ?

                          The bearing of a child takes nine months, no matter how many women are assigned.

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                          • U Uros Calakovic

                            Zeno's paradoxes[^] ?

                            The bearing of a child takes nine months, no matter how many women are assigned.

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                            C Offline
                            Chris Losinger
                            wrote on last edited by
                            #36

                            that's where my link was supposed to go... yeah :-O

                            image processing toolkits | batch image processing

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                            • R Richard Blythe

                              Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

                              The mind is like a parachute. It doesn’t work unless it’s open.

                              modified on Tuesday, July 20, 2010 11:33 AM

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                              Joan M
                              wrote on last edited by
                              #37

                              Lucky frog that made only one jump and then it started walking...

                              [www.tamelectromecanica.com] Robots, CNC and PLC machines for grinding and polishing.

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                              • R Richard Blythe

                                Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

                                The mind is like a parachute. It doesn’t work unless it’s open.

                                modified on Tuesday, July 20, 2010 11:33 AM

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                                Andrew Rissing
                                wrote on last edited by
                                #38

                                3 hops. Because the first jump is 10 feet and the last two are 5. You didn't say it was halved each time. ;-) If you did though, you're talking about an age old math teaser. I believe it was an arrow travels half the remaining distance in a second. How long will it take to arrive at its target? Answer: Never. It will always be some faction of distance away from the target.

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                                • R Richard Blythe

                                  Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

                                  The mind is like a parachute. It doesn’t work unless it’s open.

                                  modified on Tuesday, July 20, 2010 11:33 AM

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                                  AspDotNetDev
                                  wrote on last edited by
                                  #39

                                  Richard Blythe wrote:

                                  How many jumps will it take for Frogger to reach the wall?

                                  How many licks does it take to get to the center of a tootsie pop (if each lick removes half the remaining tootsie pop)?

                                  [Forum Guidelines]

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                                  • R Richard Blythe

                                    You've never played Frogger?!! I thought everyone grew up playing Frogger. No wonder your warped. http://en.wikipedia.org/wiki/Frogger[^]

                                    The mind is like a parachute. It doesn’t work unless it’s open.

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                                    Single Step Debugger
                                    wrote on last edited by
                                    #40

                                    Richard Blythe wrote:

                                    You've never played Frogger?!! I thought everyone grew up playing Frogger. No wonder your warped.

                                    I knew there should be some reason, but I thought it’s because of the incident with the cat and the TNT stick when I was a child. :sigh:

                                    The narrow specialist in the broad sense of the word is a complete idiot in the narrow sense of the word. Advertise here – minimum three posts per day are guaranteed.

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                                    • R Richard Blythe

                                      Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

                                      The mind is like a parachute. It doesn’t work unless it’s open.

                                      modified on Tuesday, July 20, 2010 11:33 AM

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                                      Abhinav S
                                      wrote on last edited by
                                      #41

                                      Richard Blythe wrote:

                                      How many jumps will it take for Frogger to reach the wall

                                      Infinite. He is not going to get to the fly.

                                      The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it. My latest tip/trick - Silverlight *.XCP files

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                                      • R Richard Blythe

                                        Frogger sits twenty feet from a wall. He has just eaten two (slow roasted) flies. ;P Now he sees another fly at the base of the wall! On his first jump, he has the energy to jump half the distance to the wall. (ten feet) :doh: All subsequent jumping power is also cut in half. :(( Question: How many jumps will it take for Frogger to reach the wall? (This is a DISTANCE question, not a "eat the fly" question)

                                        The mind is like a parachute. It doesn’t work unless it’s open.

                                        modified on Tuesday, July 20, 2010 11:33 AM

                                        J Offline
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                                        James L Thomson
                                        wrote on last edited by
                                        #42

                                        Frogger lives in a discrete world, not a contiguous one, so the answer to the question depends on the minimal distance resolution and whether the jump algorithm rounds or truncates.

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                                        • A Andrew Rissing

                                          3 hops. Because the first jump is 10 feet and the last two are 5. You didn't say it was halved each time. ;-) If you did though, you're talking about an age old math teaser. I believe it was an arrow travels half the remaining distance in a second. How long will it take to arrive at its target? Answer: Never. It will always be some faction of distance away from the target.

                                          D Offline
                                          D Offline
                                          Dan Neely
                                          wrote on last edited by
                                          #43

                                          Andrew Rissing wrote:

                                          If you did though, you're talking about an age old math teaser. I believe it was an arrow travels half the remaining distance in a second. How long will it take to arrive at its target? Answer: Never. It will always be some faction of distance away from the target.

                                          That's incorrect on multiple fronts. First Zeno created it not to try and disprove motion or anything equally silly but to disprove infinitely divisible time/distance. He failed to do so because the problem he setup requires basic calculus to solve: Specifically Limit N->oo (1-(1/N)), or Sigma N=2 to oo (1/N); both of which are equal to 1.

                                          3x12=36 2x12=24 1x12=12 0x12=18

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