A Math Card Trick I Do Not Understand

Hello Brilliant! Can someone please help me figure how this math card trick works?

Watch the Video shown below:

#Cardtrick

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Math	Appears as
Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

Hint: Where is the specially located card?

Calvin Lin Staff - 7 years, 2 months ago

I was a card magician for 2 years, and a cardist, and I have no idea how that was done. Obviously, there was no sleight, or anything like that, I think it was either luck, or it was the way he counted them. I've performed tricks like that, but not exactly that trick.

Finn Hulse - 7 years, 2 months ago

I've done a little on the algebra thats behind the trick but i can never ever get to the answer why that is though. And that is awesome how you were a card magician for 2 years! You should definitely try picking it up again.

Victor Song - 7 years, 2 months ago

Not just cards, but close-up magic in general. Yeah, I was really good. But it never really got me anywhere. :(

Finn Hulse - 7 years, 2 months ago

Hmm, this card trick is pretty nice. Thankfully, there are no numbers that can be spelled with only two letters, or else the trick won't work anymore :P

Daniel Liu - 7 years, 2 months ago

The trick is that the card being chosen is the 7th card You have to make sure you add a (s) at the end of each suit of ace of spade(S), two of heart(S) and it will work everytime In English, all cards have at least 3 letters. After spelling the first part, you basically just mirror the position of your card (e.g., instead of being 3rd from top to bottom of the deck, it will now be 3rd from bottom to top). Then, when you spell "of", you add 2 cards to the bottom of the deck, hence leaving your card in the 5th position (in the middle of the 9-card deck). Since all suits have 5+ letters, you'll then be just moving the cards surrounding your card. Then MAGIC has 5 letters :)

Mrinmay Dhar - 7 years, 2 months ago

COOL Trick...

Datu Oen - 7 years, 2 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$