Math magic!

1. 59

   Randy Godwinposted 14 years ago

   Make up a four or five digit number ex.  12345
   
   Add the total of the digits  ex.     12345 = 15
   
   
   subtract the total from the original sum  ex.  12345 - 15 = 12330
   
   
   Circle any one of the numbers  ex  12(3)30
   
   
   
   
   Give me ONLY the numbers you did not circle and I will tell you which number you circled.

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2. 59

   Ohmaposted 14 years ago

   6804

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   1. 59

      Randy Godwinposted 14 years agoin reply to this

      The number you circled is 0 or 9!
      
      Edited!

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      1. 59

         Ohmaposted 14 years agoin reply to this

         9 is correct

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         1. 59

            Randy Godwinposted 14 years agoin reply to this

            You gave me the hardest choice, Ohma!

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            1. 59

               Ohmaposted 14 years agoin reply to this

               Cant make things to easy you will get soft and complacent.

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               1. 59

                  Randy Godwinposted 14 years agoin reply to this

                  Well, perhaps complacent, anyway!

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3. 68

   blondepoetposted 14 years ago

   Gidday Randy I am ready with mine for you to give it a bash.
   
   2336

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   1. 59

      Randy Godwinposted 14 years agoin reply to this

      Hullo BP!  Your answer would be 4!  No kiddin'!

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      1. 68

         blondepoetposted 14 years agoin reply to this

         Fair dinkum you are right Randy. I am buggered to how you did that?
         4 it is. Woo hoo!!!!!!!!
         You are the man.

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         1. 59

            Randy Godwinposted 14 years agoin reply to this

            Hold that thought BP!  LOL!

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            1. 68

               blondepoetposted 14 years agoin reply to this

               I will Randy you can bet your booty.

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               1. 59

                  Randy Godwinposted 14 years agoin reply to this

                  Consider my booty wagered BP!  LOL!

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4. 89

   wildernessposted 14 years ago

   Neat, Randy.  I'll have to remember that one.  9 seems key.

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5. 73

   mrpopoposted 14 years ago

   3224
   
   I'm very curious on seeing how you do this trick

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   1. 59

      Randy Godwinposted 14 years agoin reply to this

      Lucky seven, of course, mrpopo!

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      1. 73

         mrpopoposted 14 years agoin reply to this

         This really is magic! How are you doing this??

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         1. 68

            blondepoetposted 14 years agoin reply to this

            I reckon he has magic powers lurking somewhere in there. I wonder if I pop him in a bottle he can be my magic genie.

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            1. 59

               Randy Godwinposted 14 years agoin reply to this

               You never know until I wave my wand!

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               1. 68

                  blondepoetposted 14 years agoin reply to this

                  If I pop you in an empty Handy Andy All Cleaner bottle you can be my Randy Handy Andy and give me heaps candy.

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                  1. 59

                     Randy Godwinposted 14 years agoin reply to this

                     Okay!  Sounds dandy!

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         2. 59

            Randy Godwinposted 14 years agoin reply to this

            No magic, just math!  I will tell you how it works tomorrow in case someone else wishes to try it!  I've won a few beers in my lifetime doing this trick!

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            1. 89

               wildernessposted 14 years agoin reply to this

               Or unless I sneak in and tell 'em!

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               1. 59

                  Randy Godwinposted 14 years agoin reply to this

                  Of course!  There is always that!  LOL!

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6. 95

   angela_michelleposted 14 years ago

   So what's the secret?

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   1. 59

      Randy Godwinposted 14 years agoin reply to this

      You have to be psycho...er...psychic!

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7. 73

   mrpopoposted 14 years ago

   I don't want to hurt my head figuring this out what's the trick behind it?

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8. 59

   Randy Godwinposted 14 years ago

   Okay, here is the answer to how this trick works.
   
   This trick is based on the number 9.   For example : if you give me the numbers 123, I would add them up and get 6.  I subtract 6 from 9 and get 3.  The number you circled would be 3.
   
   If the numbers totaled over 9, say 12, them you would subtract the total from 18 and get 6.  And so on with multiples of 9 such as 27, 36, etc.
   
   The only time there is not a certain answer is when the given numbers total 9, 18, 27, etc.  Then the answer is either 0 or 9.
   
   
   
   There are other tricks using nine as a basis.  It's an interesting numeral!  Enjoy the magic!

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   1. 89

      wildernessposted 14 years agoin reply to this

      I got it right!  YooHoo!

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      1. 59

         Randy Godwinposted 14 years agoin reply to this

         Indeed you did, Wilderness!  Thanks for not spoiling it!

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         1. 89

            wildernessposted 14 years agoin reply to this

            Aw, that would've ruined all the fun!
            
            Have you ever tried to figure out just WHY it works that way?

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            1. 59

               Randy Godwinposted 14 years agoin reply to this

               Yes, I actually discovered the trick in an encyclopedia years ago and it was explained fully, but I haven't thought about why it works for a long time.  There are some other neat tricks using the number nine but this is my favorite.
               
               As I said earlier, it has earned me a few beers on occasion!

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9. 73

   mrpopoposted 14 years ago

   Lol, neat trick!

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