52-Card Perfect Shuffles - Numberphile

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A card trick using perfect shuffles.
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More cards and shuffling videos: bit.ly/Cards_Shuffling
This video features math/magic expert Jason Davison.
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26 мар 2015

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Комментарии : 395

@redwaspx 9 лет назад

0:19 the only non-mathematical part of the trick is exactly the moment where the words "using maths alone" are spoken. i love this timing.

@oz_jones 4 года назад

Easy to tell when a magician is lying: his lips are moving.

@QuasarRiceMints 9 лет назад

OMG you just taught me a new way of counting a binary number... :D For example, let's take 1100101. I used to sum right-to-left 1+4+32+64=101, but I had to remember first the position of each power of 2. Now, I can read left to right, beginning with 1 and doubling or doubling plus one - depending on whether 0 or 1 appears next. In this case, 1, 3, 6, 12, 25, 50, 101 :D

@Sheldoncollier 9 лет назад

Wow, that's right. This is indeed a great revelation.

@Ruddigore 9 лет назад

Now that is nice... I shall certainly be using this method from now on

@stevefrandsen7897 9 лет назад

Excellent insight. I just got smarter thanks 2 u.

@Xunxen 9 лет назад

QuasarRiceMints I am ashamed that I didn't get that until I read your comment twice, especially since I convert numbers to binary with the exact reverse of this method...

@QuasarRiceMints 9 лет назад

***** Nothing to be ashamed of ;) Everyone has their moments of less inspiration :D

@mismag822 9 лет назад

This is not easy, but it is an amazing trick!

@hoodiesticks 9 лет назад

Oh, wow! I didn't know you watched Numberphile!

@DanTheStripe 9 лет назад

Mismag822 - The Card Trick Teacher I swear you have existed on RU-vid forever Mismag. I used to watch you 4+ years ago. Great to see you're still going. Hello again everybody ;)

@Quuantix 8 лет назад

Dang mismag since when do you watch numberphile?

@SkyFoxTale 9 лет назад

Awesome use of binary

@jack_elliott 9 лет назад

This would be a great way of giving an immediate and fun application for people learning binary as such it would be a great tool for teachers to employ.

@KunamaElgar 9 лет назад

Jack Elliott That's exactly what I thought! I taught my Year 7 Maths students about binary last term and I can see how this would be a fun way to show the applications of binary to every day life.

@lifeisawesome1391 5 лет назад

This is a great way to introduce binary in class, now I just have to learn how to do perfect shuffles...

@jesusthroughmary 5 лет назад

Best bit was at 4:48. Brady's reaction is all of us. "I still don't see how you did that!" Overall a very impressive and truly tricky maths card trick.

@frankdrebiin 9 лет назад

Wow, that was the best video in a long time here; possible the best ever. The maths, the card skills, the writing sideways and upside down. Perfection. Good job, Jason.

@kaimonington 9 лет назад

The most impressive thing here is how he writes upside down! With his left hand!

@yousorooo 9 лет назад

And sideways too.

@FerousFolly 6 лет назад

Yeah but look at the way he holds the pen

@loopbackish Год назад

@@FerousFolly yeah I used to write like that and got beaten😄

@SapphireCrook 9 лет назад

That last part with the binary. KABOOOOM! That was my brain being impressed, and then realising... yes, that is how binary digits relate to n, 2n and whatnot. Mathemagical!

@yousorooo 9 лет назад

Binary is 2^n...

@wewladstbh 9 лет назад

Yes, but take n = 101010 (42) 2n = 1010100 (84) There's a clear relationship. But yes, it is based on 2^n

@HarryWe 9 лет назад

An alternate universe where Harry Kane studied maths instead of playing football

@shubhamuraon3552 2 года назад

"You know what's cooler than magic? Math." -Peter Parker

@Nilguiri 9 лет назад

Is his hair perfectly ruffled, too?.

@Monkeyb00y 9 лет назад

I love they way he writes upside down to make it easier to show the camera. I did that in front of a customer & they flipped out, "how did you do that?" what, write upside down? easy :)

@terrystokes2948 3 месяца назад

Ohhh that's why he wrote like that... I try to write upside down in for my clients all the time... just looks a mess. I gotta try this!

@YingwuUsagiri 9 лет назад

That binary part just made it one extra level of more awesome and one extra level more of convenience because that's a really easy shortcut to use.

@ghuegel 9 лет назад

What's the deal here?... he said it would take four shuffles, he actually did four shuffles, but he should have had to do five shuffles? My best guess is that he initially moved the ace of clubs to the second position instead of the first.

@xilron5907 2 года назад

The real magic trick was how he wrote that 22 with that orientation from his holding and position.

@terrystokes2948 3 месяца назад

Yes! I stopped the video and tried to write like that before I even saw the trick!

@rafeverao4105 9 лет назад

Ooh dat sneaky Pass! Also, that is called a Faro shuffle, and it is a kind of shuffle used to manipulate the cards. With the pass, the Faro can seem magical, as demonstrated.

@naota3k 9 лет назад

I love this video. There is an amazing amount of trickery and illusion all in one video!

@tjg555 9 лет назад

I would really like to see him explain the technique of the perfect shuffle, or at least show more closeups of his hand positions and how to make the shuffle work so I can mimic it.

@Uniquethemateo7 9 лет назад

Forget the card trick, I want to learn how to write upside down like that. Now that's talent.

@terrystokes2948 3 месяца назад

Facts!

@maxedwhip1286 7 лет назад

marlo tilt beginning works quite well, second position allows you to skip first faro there

@sungodmoth 8 лет назад

If I could do perfect shuffles, this would be my favourite card trick in existence.

@andre.t.v.dejesus7592 8 лет назад

learn it on yt it called the farro shuffle

@KarnKaul 9 лет назад

This is the awesomest trick I've ever seen.

@MikeDolanFliss 9 лет назад

Nice pass and beautiful shuffles.

@wmconorbrown 9 лет назад

Loving this card/math videos

@SMOshee 9 лет назад

That was amazing! Mooooom!!!!! Where are my cards!?!

@simply42 7 лет назад

I'm currently learning the Faro shuffle and happen to be familiar with binary. Thanks you so much!

@rickintexas1584 6 лет назад

Great video. I use perfect faro shuffles I’m my card trick routines all the time.

@PieInTheSky9 9 лет назад

I could watch these videos forever, I seriously could..

@ankitakhanda684 9 лет назад

His skills are such a high level of sorcery, I could never do that effectively!

@Djmaxgamer 9 лет назад

There are still a few unexplained things happenning : - he only did 4 shuffles : he must have put the card on the second position, not the first one. - how is he splitting the deck exactly in half to do perfect shuffles ?! It only matters if the number chosen is large, but whatever, he manage to do it every time !

@JaspasOnline 9 лет назад

It's 100% about practice. He's great though :O

@sas911 9 лет назад

Splitting the deck exactly in half requires a fair bit of practice, but is very possible for someone to learn, especially for anyone interested in doing faro shuffles.

@stanleypsj 9 лет назад

Sylvain Janet You don't have to split the deck into halves exactly cos the bottom cards are essentially useless and there was one shuffle where there were 2 or 3 cards at the bottom.You just need to be precise on what's above the given number.

@Djmaxgamer 9 лет назад

" It only matters if the number chosen is large, but whatever, he manage to do it every time !"

@lionskull1 9 лет назад

it doesn't seem to need to be perfectly in half, unless the viewer chooses a large number.

@robmckennie4203 9 лет назад

Getting the cards to weave together perfectly is surprisingly easy if you have a nice crisp deck of cards, the harder bit is consistently cutting the deck into equal segments.

@raymondomahony6330 9 лет назад

More by this guy please!

@BigBrianStormer 9 лет назад

That perfect shuffle alone is amazing

@fcycles 9 лет назад

Very interesting to see that shuffling cards like that can be made. But, although it's not the topic of that video, each time I saw someone wearing a ring on his thumb... I keep remembering the CPR course I got years ago which warn us to never wear a ring on our thumb. Because if there is one finger you don't want to lose, is your thumb! And having a ring increase the risk on that finger to lose it...

@Pepetex26 9 лет назад

what a beast. awesome video

@adrianacuna1594 9 лет назад

Really liked this video !

@aedificabantur 9 лет назад

This is really cool!

@illdie314 9 лет назад

Right when I realized it was in binary, my mind was blown. How does that work!?

@illdie314 9 лет назад

You could also do this trick with a smaller number of cards so you can do an easier perfect shuffle more quickly

@anindyabiswas1551 5 лет назад

Wow! He writes in a magical way!

@savinaynangalia7349 9 лет назад

One additional point since it isn't mentioned anywhere: At the beginning of the video, the guy said he could get to any position in 5 shuffles but 5 digits of binary only count to 31 which is not enough to get through a pack of 52 cards. For those who want to do the trick in 5 shuffles: So if Brady picked a number like 45, then the guy would have put the card in the 7th position from the top, i.e. 6 cards above it and then started counting cards from the bottom of the pack instead of the top :) (This example would take 3 shuffles)

@patrese993 9 лет назад

The math is quite simple, handling the cards like that is pretty impressive. I'd like to see that with a deck i've been playing for twenty years now ^^

@TheSloveniaGuy 9 лет назад

How does he split the deck directly in half?

@nicholaskeefe5335 9 лет назад

Practice.

@SexyTRex 9 лет назад

Witchcraft

@mikeralph 9 лет назад

It does not need to be split exactly halfway in this example. as long as he has at least 21 cards in each group, the trick will still work.

@Formulka 9 лет назад

just look at his sleight of hand, he knows his cards :)

@Nathanchooper 9 лет назад

Mike Ralph Not if Brady picked a number higher than 26.

@BeastOfTraal 9 лет назад

This card series was great

@bluecombats 9 лет назад

I saw Rob Eastway do the same trick at a Science showoff gig, except he had a back up plan if it all went wrong. Still an amazing trick

@Rajivrocks-Ltd. 9 лет назад

That's a real clever trick.

@chrisw7188 9 лет назад

that is some funky grip on the sharpie....

@Seawolf159 9 лет назад

Amazing pen holding skills!

@adnanmustafa73 9 лет назад

Loved it!

@hauleroid 9 лет назад

Great, make more math-card tricks, it is very interesting!)

@bobhoffer5426 2 года назад

I'm astonished that this video has not drawn more comment from fellow card magicians; We must be a much smaller group than I thought! The "perfect" shuffle that he so expertly demonstrates, is in fact a Faro shuffle. The late, great Ed Marlo was the master of the Faro shuffle, and published a rare but excellent booklet on how to perform and use it. Let me offer a few tip to those aspiring to master the full-deck Faro shuffle. 1. Use a new, 52 card deck of Bicycle brand playing cards 2. Work with clean hands and don't bend the cards 3. Find a Faro Shuffle tutorial on youtube, and look for Ed Marlo's booklet. 4. Carry those cards with you everywhere, and practice every chance you get.

@yazka82 9 лет назад

That suffling part was neat but easy to follow. But the binary part? mind.blown. I didn't see that coming.

@HeroEric98 9 лет назад

that perfect Shuffle Looks insane :o

@Semikami 9 лет назад

Sleight of hand was great but that binary part blew my mind.

@7W33K 9 лет назад

Most impressive this in this video? Jason writing upside-down left handed!

@Josh-qe1hw 6 лет назад

Nonchalantly writing upside down better than i do right side up is the real magic here!

@noahiscool9002 9 лет назад

Yeay, i fugured it out bevore The explenation :D cool trick and i like how you move your hands :p its smooth :)

@rbfjunkie1 9 лет назад

You should do a video about strategies in solving the Countdown math problems.

@SimNico 9 лет назад

I suddenly have an urge to go get a deck of cards.

@VineetPatelACA 9 лет назад

At 0.47 he says "4shuffles". But the answer is 5 shuffles!

@CrazedbyPenguins 9 лет назад

Vineet Patel I was wondering about this too, but I've figured it out! During his explanation, he says he puts the chosen card on top, but he really puts one more card on top of it, making the first 1 shuffle unnecessary. (You can see this barely if you slow the video down to 0.25x and look really closely during his performance of the trick.)

@Dinner_Roll 9 лет назад

Collin Deel This makes sense when you consider the trick represented in binary, every number they could have chosen would have to start with a 1, unless they chosen the 0th position, so using slight of hand to put the card in the second spot would (almost) always work

@heero854 9 лет назад

Which they would have done it with the top card showing face up! Absolutely amazing.

@2000iceball 9 лет назад

Such Faro, Very nice.

@WillyTheComposerOfficial 9 лет назад

This guy writes upside down like a beast

@BeeEatingOrchid 2 года назад

Fun fact. If you do the same perfect shuffle 8 times in a row, the deck will return to the exact same order it was in before you started :)

@johnmeo1532 9 лет назад

Oh my God!!!!!! This is beautiful!!!!!!! I absolutely love it!!!!!! I love math and I love magic!!!!! This is insane!!!!!!

@jamespalmer1030 9 лет назад

I am a magician and a few years ago i learnt an effect by lewis le val now i believe even he doest know how it works and while i was still in school i asked my maths teacher and he had no idea either both knew it was some form of mathematical principal and i thought these clips would give me the answer but instead they have made me more confused ... so now I'm here on numberphile asking if anyone would take a look at a performance if i filmed it and see if it is maths or just luck

@NewGoldStandard 2 года назад

This is like asking Hendrix how he makes it look so easy.

@oafkad 9 лет назад

That was so damn cool. Wow.

@grandolddrummer 9 лет назад

Aww! That's neat!

@RhapsodyAfternoon 9 лет назад

Brilliant.

@ThreeXcore 9 лет назад

Math is the universal language. I love it !

@Zandonus 9 лет назад

If every race in the galaxy used binary, then yeah. I can probably get used to base 12, but i doubt Gorglax would feel safe if i told him the price in base 12. He'd probably have to google it.

@ThreeXcore 9 лет назад

LOL... I agree that base 12 should be the default way of counting... but math in general (not the symbols used) are the universal language OF the universe. edit: typo

@CBMaster2 9 лет назад

This guy is a little better at doing perfect shuffles than Federico Ardila in the last video :P

@lock_ray 9 лет назад

That's actually a pretty cool way of translating binary into decimal. Instead of doing the powers of 2 thing and adding all those with a 1, you just start with 0 and then read the number doing 2x+1 for every 1 you encounter and 2x for every 0... That's alot faster in my opinion :)

@NickZoOoR 3 года назад

didn't know Harry Kane was also a magician

@eezablade 3 года назад

Harry Kane has been doing cats tricks too much, that’s why he’s forgotten how to play.

@NoahTopper 9 лет назад

I love how blown away Brady was by the sleight of hand. My cynical magician self was just like "Obvious pass is obvious."

@ewaninglis4026 9 лет назад

Woah that's cool.

@thinhhuynhkhac6541 4 года назад

So if you have a deck with N cards. Each time you shuffle, you take k cards on the top of the deck and rearrange them in the deck with N-k cards. so that they have q-1 cards between two consecutive cards. There are q-1 ways to shuffle the deck like that, depends on the position of the first card of the deck after shuffling (r=0,1,...,q-1). Do you use the q-base numbers ?

@ModernRascal 4 года назад

The craziest thing about this video is how that dude held his pen

@cassia_cries 9 лет назад

awesomeness 😊

@sbeckmesser 9 лет назад

In my first digital engineering course (taken back in the mid 70s) I was taught the binary-to-decimal conversion algorithm covered here under the name "double dabble." See the Historical section Wikipedia's entry for double dabble.

@SledgerFromTDS. 4 года назад

Factorials is a mathematical method to solve combinations

@darklyXlit 9 лет назад

the fact he was able to write everything upside down is almost more impressive than the trick.

@ehhorvath13 9 лет назад

"That's a perfect shuffle, that's good enough for me" lols

@frosty9392 9 лет назад

"Mathamagics" Love it

@teenagedgaming 9 лет назад

This is the mist exited i've been for a magic trick since i was 10.

@donovanblake3910 9 лет назад

that's beautiful.

@austinwilson662 6 лет назад

He writes better upside down than I do normally.

@DrMerlochSilvermaine 4 года назад

I believe this was first developed and published by the magician and computer scientist Dr Daly (of "Dr Daly's Trick" fame) in the 1950's.

@thirumammalkanakarajano4956 3 года назад

This trick does not require someone to do a perfect shuffle, it only requires us to know how to do a partially perfect shuffle

@kayveevee 9 лет назад

He's good!

@DhuumB 9 лет назад

Dafuq I was really stunned at the end when he showed the "easy" way of doing it :D

@bryantenpas8301 9 лет назад

"mathemagics" I will never forget that line

@goemon4 9 лет назад

this is dammed brilliant haha

@vicerearadmiralfirstclasso5912 9 лет назад

MATHEMAGICS!!

@MegaQwertification 9 лет назад

At first i was really impressed, but then the binary part really blew me away :O Mathematics is incredible.

@GUSTAVOPINGPONG 2 года назад

yeah, how the f**k does binary numbers fit perfectly on what he wants to do here... amazing... exactly the part that all those 1s and 0s equal 21

@The5thStateOfMatter 9 лет назад

Mind=blown

@LOLworldofwarcrafLOL 9 лет назад

Holy shit - when I saw how he shuffled I wanted to try it out myself, so I got my deck of cards and took it out of the pack when I noticed 1 card had stayed behind, and I shit you not - it was ace of clovers