| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 105.1 | | MILKWY::SMCCORMICK | Hurricane Scott | Fri Apr 02 1993 04:54 | 6 |
|
Actually, the whole thing is quite simple. It's all
mathematics.
Scott.
|
| 105.2 | | STOWOA::PIERCE | Think Spring | Sat Apr 03 1993 01:55 | 10 |
|
I do alot of math card tricks, this one was a very good one. I
would agree it was simple, if everyone had the same amount of letters
in there name....but we don't.
My name has 6 letters, my husbands has 3...and the trick worked
for both of us. We both shuffled our cards differently. I keept
shuffeling mine and he just did his twice.
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| 105.3 | Anyone have details on the card trick? | DPDMAI::POGAR | Resident Movie Critic & Costner Fan | Sat Apr 03 1993 06:03 | 8 |
| Could someone post the card trick? It looks like I recorded Melrose
Place over David Copperfield, before I had watched DC. My mom has been
talking about the card trick every day since.
Thanks in advance.
Catherine
|
| 105.4 | card trick exp | STOWOA::PIERCE | Think Spring | Tue Apr 06 1993 06:58 | 32 |
|
hmmm post the card trick.. now that would be a trick in it self,
but I'll give it my best shot.
David asked you to select 9 cards at random from your own deck.
Then he had you pick the 2nd card from the left..this would be
your card. Mine was a King of Clubs.
Then he asked you to shuffle them and stop when you wanted..
Then he asked you to count out the letters in your name.. so if
you had 6 letters in your name you'd count down 6 cards.
I don't remember much of the next step.. I think we had to put the
remaining cards on top of our name.
Then he had you come to the TV and hold up 3 cards from the top of
the deck.. (you had to touch he hand) and he thought a moment and
he said "NO" that's not your card.
he had you hold 3 more cards from the top of the deck and he said
"no" that's not your card
Then he had you 1 card up.. and the answer was NO then 1 more and the
answer was no.. then the very next card he said was you card...
and it was!
Good trick
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| 105.5 | | NEWPRT::NEWELL_JO | Jodi Newell - Irvine CA | Tue Apr 06 1993 08:25 | 9 |
| After spelling your name, he had you spell his name D-A-V-I-D.
Then he proceeded as posted.
The second card from the left side of the deck was chosen
because someone in the audience, who was given the option of
calling out any number between 1-9, chose "2".
Jodi-
|
| 105.6 | | VENICE::SKELLY_JO | | Wed Apr 07 1993 15:41 | 30 |
| I didn't remember the trick quite as described, but I have a lousy memory,
so I borrowed the tape and this is how it goes:
David asks you to take any 9 cards out of a deck and put the rest of
the deck away. He asks you to shuffle the 9 cards in any fashion, then
fan them out in your hand like you would hold them while playing a card
game. He takes a rose and tosses it into the audience. He asks the
women who catches the rose to pick a number between 1 and 9. She picks
2. He asks you to look at the second card from the left and remember
what it is. Fold the fanned cards up and begin dealing from the top of
the deck.
Deal one card at a time, face down, on top of each other, until you've
dealt one card for every letter in your first name. If there are cards
remaining, place them all together on top of the ones you've just dealt and
pick them all up again. Repeat the deal, this time counting out the letters
in his name. Again, place the remaining cards on top and pick them all up
again.
Deal one card from the top of the deck, then another and then as many other
cards as you want. Stop whenever you want and place the remaining cards on
top. Now you take the top three cards from the hand and hold them up to the
screen. He tells you your card is not in that group. Then he asks you to
deal out two more cards and hold them up. Your card's not in that group
either. Deal out one more card and hold it up. That's not it. Do the next
one. Aha! That's it.
For those interested in such things, an analysis of why the trick works
follows in the next reply behind a <spoiler warning>.
|
| 105.7 | | VENICE::SKELLY_JO | | Wed Apr 07 1993 15:44 | 45 |
| What the trick does:
<spoiler warning>
From the point at which he knows the target card is second from the
left, it's essentially a simple matter of card counting. The second
card from the left is the second card from the top. Unless your name
has only one character in it, after the first deal, the target card
will be second card from the bottom. After the next deal, the target
card is third card from the top. At this point an error could occur. He
needs you to deal out at least three cards. He minimizes the potential
for error by telling you to deal the first two. He then tells you you
can deal as many cards as you want as he deals the third card. There is
a natural inclination if you're following closely to deal that card as
he does, and even if you don't, chances are that you won't think of
stopping the deal immediately. The target card is now the third card
from the bottom. He simply counts down to it, 3+2+1 = 6, and there it
is, the next card.
A diagram (T = target card, c = other card):
At start After deal 1 After deal 2 After deal 3
top: c c c c
T c c c
c c T c
c c c c
c c c c
c c c c
c c c T
c T c c
bot: c c c c
The question is, was the women who picked position 2 in the first place
an assistant? I suppose he's clever enough to figure out how to make it
look like he tossed the rose to her. It's probably easier, however, to
adjust the dealing scheme somehow. I wonder what he does? I imagine he
has to add an extra step to move the card up to the top of the deck
before he asks you to spell your name. Otherwise, it's position would
be unpredictable. He really has only three positions to account for,
since position 1 would work as easily as 2 and he can always count in
from the right side of the deck instead of the left. If he can solve
positions 3, 4 and 5, he's all set.
|
| 105.8 | | NEWPRT::NEWELL_JO | Jodi Newell - Irvine CA | Wed Apr 07 1993 16:34 | 8 |
| Geeez John, I said you could borrow my tape,
I didn't know you were going to analyze it
complete with diagrams! ;^)
You should post last year's Copperfield trick
and analysis too.
Jodi-
|
| 105.9 | Oh, so you mean this.... | DPDMAI::POGAR | Resident Movie Critic & Costner Fan | Thu Apr 08 1993 06:56 | 11 |
| I thought that using David's name (5 letters) and then dealing out 3
cards, then 2 cards, somehow "added" 10 to the positioning of the cards
such that the original card was reversed in some way. By adding 5 cards
(DAVID), the chosen card "moved." Then, it "moved" another 5 positions,
meaning it would be two positions from its original position, therefore
the 4th card form the left.
Are any of you as confused as I am?
Catherine
|
| 105.10 | | VENICE::SKELLY_JO | | Thu Apr 08 1993 14:38 | 82 |
| Re: .8
Well, Jodi, that's an awfully simple trick in comparison, but you did
loan me the tape so I'll oblige you.
The analysis, if you can call it that, follows in the next reply, behind a
<spoiler warning>.
(By the way, I've thought of a simple extra step that would make the card
trick work, no matter what number the woman in the audience picked. I
haven't David's finesse, so I'm still curious to know what he would have
done, but I've concluded the woman wasn't his assistant. An assistant is
unnecessary.)
The first Copperfield interactive trick with the home audience...
A diagram is displayed on the screen. It looks sort of like this:
[s] < < X
[c] [r]
[M] [E]
[m] [N]
[L] [t]
[T] [P]
[d]
Try to imagine it as basically a circle composed of round pictures of
places (each [x] is round picture). s = a star, c = clouds, M = the Moon,
m = mountains, L = the Statue of Liberty, T = Taj Mahal, d = a desert, P =
the Pyramids, t = a tree, N = New York City, E = Eiffel Tower and r = a
rainbow. the < < X is a tail on the circle consisting of smaller round
pictures, two arrows and a cross.
Step 1: Pick a number between 5 and 15. Put your finger on the X and count
counterclockwise the number you picked. For example, if you picked 6 you'd
be pointing to [m], the mountains. You keep your finger on the screen.
David removes the arrows and the cross. The diagram now looks like this:
[s]
[c] [r]
[M] [E]
[m] [N]
[L] [t]
[T] [P]
[d]
Step 2: From where you are, move clockwise, again the number you selected.
As you hold you finger on your new position, David will reveal that he now
knows that you're not in the mountains, on the rainbow, in the Taj Mahal
nor the Pyramids, and removes those pictures. The diagram now looks like
this:
[s]
[c]
[M] [E]
[N]
[L] [t]
[d]
Step 3: From where you are, move, counting to 4, in whichever direction
you want. At your new position, David will tell you he now knows that
you're not in the clouds, New York City or the Eiffel Tower and these
pictures are removed. The diagram looks like this:
[s]
[M]
[L] [t]
[d]
David inserts an arrow into the middle of the diagram which spins around
and points to where you are.
Where you are is behind the following <SPOILER WARNING> in case you want to
do the trick first:
You're on the Moon.
|
| 105.11 | | VENICE::SKELLY_JO | | Thu Apr 08 1993 14:39 | 61 |
| What the trick does:
<spoiler warning>
The mathematician in me wants to talk about modulus arithmetic, but that
would be an over-complication of the matter. Modulus arithmetic is also
called clock arithmetic, and that's the basis of the whole trick. You're
looking at a clock. If I asked you to start at 12 o'clock and count any
number of hours counterclockwise, then count the same number back you
wouldn't be too surprised to find yourself back at 12 o'clock.
David basically asks you to do that. He just misdirects you, first by
asking you to start 3 o'clock instead of 12, and then by rolling part of
the clock up, off to the side. Consider:
12
11 1
10 2
9 3
8 4
7 5
6
You're going to start counting from 3 o'clock, but first, let's pull the
rim of the clock up.
12 1 2 3 <-start counting from this 3
11 1
10 2
9 3
8 4
7 5
6
The 5-15 restriction on the numbers is really another distraction. He needs
to get you onto the face of the clock, so he has to make you choose at
least a 3, but any number 3 or greater will work. Once you're on the clock,
he removes the tail and you dutifully count back to the real 3 o'clock.
So you can see, at the end of step 2 he already knows where you are. You're
on New York City. He now removes 4 numbers from the clock, leaving 8.
Specifically he removes 1, 5, 7 and 9. The clock looks like this:
12
11
10 2
3
8 4
6
In fact, he could have removed any four numbers except 3. The result would
be the same. If you count 4 from 3 in either direction you end up at the
same place, in this case 10, the Moon in David's diagram.
As you can see, there's actually nothing random in this trick at all, no
possibility for the trick to fail, unless of course, the audience can't
count.
|
| 105.12 | | NEWPRT::NEWELL_JO | Jodi Newell - Irvine CA | Thu Apr 08 1993 14:56 | 7 |
| Thanks John.
And this from a guy who uses a calculator
to figure out tips at lunch. :^)
Jodi-
|