I hit the final note.

It's also the name of today's show.

Welcome to Michael's Math Magic.

I wanna show you a tool today that's very special to me.

These are regular old bicycle playing cards that are anything but regular.

We here at Vsauce designed these to do something very special.

They come in Curiosity Box 12 which many of you already have and some of you it's on

it's way to you.

When you open the cards up you'll find that you get 52 regular cards with really cool

backs.

Take a look.

It's got Inc on there with some nautical stuff.

Some ship wheels some whales and pirate booty as they say in the pirate trade.

But I've been playing with these cards for a bit already.

They're all shuffled up.

I'll shuffle them a few more ties to really convince you that I don't know where any

of the cards are.

And I'm being really honest at this moment.

It doesn't matter what order the cards are in.

And then the magic will happen.

Alright.

Now often a magician will be able to guess a card randomly chosen from a deck.

Right?

A magician like myself.

Not today.

No no no.

We're gonna go even further.

Today the person guessing a card chosen from this deck isn't even in this room.

Where are they?

Well I will show you.

We have taken Jack who works here at Vsauce and locked him away.

I'm gonna use my phone camera to show you where he is.

Follow me.

We gotta leave the studio.

Okay.

There's Hannah.

And let me just carefully walk through the dark, leave the studio, wonderful!

Okay now where is Jack.

Is he there?

No.

Where is he?

Maybe he's in the refrigerator.

Oh no of course he wouldn't be that would not be safe.

Sometimes he's up in the loft or he's inside the trash can.

Not today though.

Nope.

Today we have locked him away, not in Testing Room B, but in Testing Room A. Jack are you

ready?

Yep.

Alright let's do this.

Okay.

So let me make my way back.

I want to do this all in real time.

No edits.

Real magic.

Okay going back into the studio.

Hannah, I'm back.

And it's time for us to use these special cards.

Ready?

Here we go.

I'll give them one more shuffle and then I'm gonna pick a card out of the deck.

Now Jack has his phone with him and I'm gonna text him and he's gonna text me and

it will be through texts that the magic occurs.

Here we go.

Let's pick this card right here.

I have no idea what this card is and certainly Jack who is not even in this room and is actually

as far away as he can be in this office does not know what that card is and I'm going

to ask Jack to guess what this card is.

Okay.

So here we go.

Ready?

It's time to guess the card Jack.

Okay.

Let's see what happens!

Send.

This is what happens when you try to do a trick in real time.

There can be some waiting but this is all part of the experience.

You can feel the psychic energy between Jack and me and the cards and the phone and Hannah,

a little bit.

Alright Jack can you do it?

I don't know the card.

How could he know the card?

Locked away in a bathroom.

Well perhaps it's not a bathroom.

Perhaps it's a throne of magic.

King of hearts!

Is this the king of hearts?

The king of hearts!

What?!

Excuse me?!

Let's try this again.

Let's try this again.

I have no idea which card is which.

I'm gonna pick this one.

Okay.

I don't know what it is.

Jack certainly doesn't know what it is but let's ask him to tell us what it is.

Okay.

Hello, okay Jack.

Can you guess the card?

I sent it.

I can feel that electricity.

Now Jack isn't the only one who can do this and let me reassure you that this is a real,

these are real texts.

I'm not using some kind of special app.

There are no additional cameras in this room besides the ones that are here and here and

Jack is not listening to us.

He doesn't have any kind of elaborate system of mirrors that allow him to look under the

table from inside the bathroom.

He really is in there with nothing but his dreams and his phone.

And with those tools alone Jack will think about what card this might be and he will

be able to miraculously be right.

Nine of spades.

Is this the nine of spades?

There it is!

The nine of spades.

How the heck is this trick working?

Well it's time for me to let you in on a little bit of a secret.

Jack knows what card has been chosen because I know what card has been chosen and I tell

Jack which card was chosen through code.

The special thing about Inq's playing card is that this isn't just a regular deck.

It is a marked deck.

Which means that by looking at the back of each card you can tell what the card is.

If you look at these three cards they all look incredibly similar from the back.

Only a trained eye, only someone who knows what to look for can upon close inspection

really determine the secret code on the back.

What I wanna do is…is there a pencil around here?

Or any kind of sharp pointing object?

Even, actually Hannah, give me your friend.

Thank you very much.

Okay take a look at the back of this card.

We've got ships wheels.

Look at the ship wheel in the upper left hand corner.

It doesn't matter which way the card is because the secret code is hidden in the upper

left hand corner no matter how you rotate the card.

You'll notice that there's a ships wheels with 12 handles.

Those 12 handles can be read like a clock.

Who you look at them you look to see if a handle is missing.

In this case on this particular card no handle is missing which means the card is a king.

It's that easy.

But what's the suit?

Well if you look inside the wheel there's a line and the line is thicker here on the

right than it is anywhere else.

By following typical CHaSeD order which I introduced in the Si Stebbins video just a

bit ago, you can from 12:00 around moving clockwise tell what the suit is by looking

at where the thicker line is.

If it's thicker at the top you have a card that is a club.

If it's thicker on the right it's a heart.

Thicker on the bottom it's a spade.

Thickest on the left it is a diamond.

This ships wheel is thickest on the right hand side which means that this is a club

heart.

This is a heart.

A king of hearts.

And it is in fact a king of hearts.

Let's look at this card.

Now this card is missing a handle right there at the 2:00 position so it's a 2.

And the line on the ships wheel is thickest at the bottom which tells us this is a spade.

A 2 of spades.

Boom.

Let's do that one more time.

Right here.

Perfect.

Okay.

So looking at this ships wheel we see that the handle is missing at the 10:00 position.

So this is a 10 and the line is thickest up at the top.

So it's a club.

A 10 of clubs.

Piece of cake right?

Unless you know what to look for though, this is incredibly hard to figure out.

Of course when you do a trick with these cards you shouldn't just do it like this.

Uhh hey uhh uhh what's uhh what's this card?