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Hello again everybody. Today I'm going to show you a performance and tutorial for
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a pretty easy mathematical card trick. Credits for this trick go out to Matt
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Parker of Stems Math Magic and a lot of you know him from Number File. The links
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will be in the description box below.
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So what I have over here are cards. We have the Ace through Nine of Hearts.
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So we'll take the , 2, 3, 4, 5, 6, 7, 8, and 9 of .
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Now we're going to the cards in a little bit of an unusual way. I'm going
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to either place the card just like this or I'm going to swap the cards just
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that. 3 and the 4.
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Or I’ll place the card down or I'll swap the cards. And as I the cards,
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you're tell me whether to place it down or swap it and we the
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last card.
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Obviously we have to place it down. So once again the card––to leave––to go down
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or we'll the cards.
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So now let's begin and we can do this you like.
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Okay, down, swap, swap, down, down,
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swap. All right you're not here, so I'm just guessing what you're saying.
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Down, down, down, swap, swap, down, down. One more time. Down, swap, down, swap, down, swap.
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and let's do it .
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Down, down, swap, swap, down, down, down.
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Okay, so we could have gone on all day long, but let's just see where you me,
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how we the cards. 3, 5, 7, 6, 8, 9, Ace, 1, 4, 2.
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So with the numbers one nine
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there are 362,880 possible combinations. You multiply 9 times 8 times 7 times
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6 times 5 times 4 times 3 times 2 times 1 and this is the combination that you
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, with the pattern that you wanted me to the cards. Now, in the
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card box the entire time I've been sitting here, there’s
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one card. It's a blue card and on that blue card I have 3, 5, 7, 6, 8, 9, 1, 4, 2–the
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exact order that you have the cards.
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Okay, let me you how this is done. The setup for this trick actually
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when you're what you're going to do. So you set the cards up Ace
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through Nine and you––make––your prediction 3, 5, 7, 6, 8, 9, 1, 4, 2.
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You can it a piece of paper. You can put in the card box. You can it
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to the side.
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The way you're going to explain this is you're going to have the Ace on and
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you're going to tell the what you're is, they're
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you whether they want you to put the card down and you're
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it over.
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See, when you flip the cards over it actually disturbs the order. When you
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don't flip the card over it doesn't the order at all.
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You're going to over the 2. Then you say you can swap the cards and
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you're going to the 3 and the 4. Then you going to turn the
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five. Then you're going to swap the 6 and the 7. Then you're going to turn over the
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8.
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You're going to say with the last card, you have to that .
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Then “ .” You show it to them. You , “You can have any”––place the card
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down and you show the Ace––“or you can have me swap the cards.” And this will be
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the Four and the Two that you’re and you set that down.
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Now you these three cards and you move them to the of the pile.
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Now you're all with 3, 5, 7, 6, 8, 9, 1, 4, 2
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And the reason why is it doesn't how you deal this is if they say “Down” the
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3 goes down. If they swap, the 3 goes down, so down, swap, down, swap, down,
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down, swap, down, swap, down, down, down.
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It doesn't matter how many times you do it.

[. . . . . . . . .]

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Glimpse the card. If it's a 2, you know that you from the top.
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If it's a 3, you just turn the cards over and then just show the numbers 3, 5,
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7, 6, 8, 9, 1, 4, 2. An easy way for you to see how this works is if we do this with the
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cards face-up. So I say down, swap, swap, down, down,
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swap. There you see absolutely nothing happens.
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Swap, down, swap, down, down,
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swap. So nothing happens when you're just setting the cards face down.
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Now this may seem really obvious, and if you feel that this is too obvious,
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try it on somebody. Most people won't .

[. . . . . . . . .]

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So now that you know that it's there, it on somebody.
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You'll be that they won't see it now that you see it.
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It's glaring and you'll see it every time same thing with this
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it looks like it's a pretty obvious trick but it's not. It should
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people. Try it on somebody.
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Let me know what you think. That's it. I'll see you next time.