The Not 21 But 27 Card Trick (Mathematical Magic series)

[@Amuny666]

Tip for presentation; What I do is split the deck in two exact pile (26 cards each) Then I make the spectator select a pile and select a card from that pile. Then I add the selected card to the other pile. Which makes 27 including his card and makes it much less awkward to explain the "27 cause it's cute".

[@mismag822]

Here's the order you stack the piles each of the 3 times for EVERY number from 1-27 T-Top M- Middle B-Bottom (Remember to deal with the cards face down and flip them face up) 1-TTT 2-MTT 3-BTT 4-TMT 5-MMT 6-BMT 7-TBT 8-MBT 9-BBT 9-BTT 10-TTM 11-MTM 12-BTM 13-TMM 14-MMM 15-BMM 16-TBM 17-MBM 18-BBM 19-TTB 20-MTB 21-BTB 22-TMB 23-MMB 24-BMB 25-TBB 26-MBB 27-BBB

[@David-yx5vx]

WIDave0311 the second one is wrong. It always cycles tmb in the first row, tttmmmbbb in the second and tttttttttmmmmmmmmmbbbbbbbbb in the third

[@Thanasis_Koligliatis]

@@Space_Debris Good observation

[@mismag822]

Yes. Actually it's not really memorizing the order... it's an easy way to figure it out in a few seconds after they name their number. I'm considering making a tutorial.... should I?

[@Zimpfnis]

It's Matt Parker! I have a whole new channel to watch now.

[@cypris.127]

i found a working yet simple methode: Start with TTT as 1. For a +9 you go one deeper on the last set, for a +3 you go one deeper on the middle set and for a +1 you go one deeper in the first set. For exemple: The number is 20. Start with TTT = 1; +9 -> TTM = 10; +9 -> TTB = 19; +1 -> MTB = 20. The number is 13. Start with TTT = 1; +9 -> TTM = 10; +3 -> TMM = 13. The number is 18. Start with TTT = 1; +9 -> TTM = 10; +3 -> TMM = 13; +3 -> TBM = 16; +1 -> MBM = 17; +1 -> BBM = 18.

[@vipero07]

First sort location selection represents the position in the final 3 numbers. So going with the example in the video middle represents 8 (from the minor tuple 7-8-9). Second selection represents the minor tuple of 3 #'s inside the major tuples. In the case of the example it is bottom so the minor tuple is 7-8-9 from the tuples of 1-3, 4-6, and 7-9. The third and final selection is which of the major tuples. Since the major groups are 1-9, 10-18, and 19-27 top (as the example given) represents 1-9. The easiest way (IMHO) to determine the sort locations is divide by 3.

[@alexsh4517]

anyone else came from Vsauce

[@SuperBoU]

+1

[@GreenArmy420]

+Alex SH that's me

[@gagauzsznts5416]

+Alex SH yes

[@willawanders]

Same

[@joanthonyrodriguez9449]

Absolutely me

[@IssamChaouch2]

vsauce brought me here

[@DajuSar]

Or did he?

[@kalagai7987]

An easy step by step formula to calculate without remembering every combination: 1. See if the number is 1-9 (proceed to step 2), 11-18 (subtract 9) or 19-27 (subtract 18). 2. See if the result is 1-3 (first placement is Top), 4-6 (first placement is Middle) or 7-9 (first placement is Bottom) 3. (Take the groups from step 2) if your result was the first number of any of these groups, the second placement is Top, if the second, then Middle, if the third, then Bottom. 4. Take the original number (from step 1), if the number is 1-9, last placement is Top, if 10-18 then Middle, if 19-27 then Bottom. Example: number 23 1. It is 19-27 so we subtract 18, we get 5 2. It is 4-6 so first placement is Middle 3. It is the second number of the group so second placement is Middle 4. The original number was 19-27 so last placement is Bottom Order: Middle Middle Bottom

[@cancelcancel6613]

Can you give an example of 1-9. I keep trying seven but it always at 9th place

[@cancelcancel6613]

I just found out that this is a scam

[@santanubhattacharya316]

Also for the number 15 your trick fails.

[@Silentsouls]

If only a deck had 64 cards, =D

[@anonymousanonymous629]

This people make it so complicated. Make it so simple.

[@FiatLux47]

DON'T LEARN THE COMBINATIONS BY HEART!! Just learn how to compute them. It's quick and easy. Ask the number to the spectator a bit earlier if you need more time. Example with 18: Subtract 1: 18-1=17 Compute X as 17 divided by 9. You get X=1 and the remainder is 8. Compute Y as the remainder (8) divided by 3. You get Y=2 and the remainder is 2. Finally, Z is simply the remainder (2). --> Your combination is ZYX, that is 221, which means Bottom-Bottom-Middle. (0=Top, 1=Middle, 2=Bottom) :)

[@squirrelboy4233]

This does not work for me, I might be messing something up thougj

[@squirrelboy4233]

I was doing xyz not zyx my bad

[@edgunther6533]

If the number is a multiple of 3, the first cut goes bottom. If the number is a multiple of 3-1 the first cut goes middle. If the number is a multiple of 3-2 the first cut goes top. If the number is a multiple of 9-(0/1/2), the second cut goes bottom. If the number is a multiple of 9-(3,4,5), the second cut goes middle. If the number is a multiple of 9-(6,7,8), the second cut goes top. If 1-9, the last cut goes top. If 10-18, the last cut goes middle. If 19-27, the last cut goes top.

[@pontus3018]

You are just making it much harder for everyone the first time when the spectator is going to pick 1 pile put it in the middle and after that put it on the top everytime 3 times then put out 6th cards and his/shes card will be on the 7th

[@MrCutsandCards]

1:01 lol he is a rapper

[@karlbjorn1831]

Lawl

[@mysteriesinmind]

Nice trick! Also, nice hair!

[@Jamez5800]

Love Matt Parker

[@willawanders]

The exclamation is on numberphile.

[@duckieace]

yes please it could really help some of us into remembering the order :)

[@sockmaster2718]

Yeah, he actually does this trick on numberphile and explains it in much more detail

[@Thanasis_Koligliatis]

Could you please share the link of the video, or the title

[@xeroaxlvx]

No way! That guy is on numberphile, he's pretty amazing

[@theeviking7395]

My dad taught me this trick years ago.

[@leontangable]

me, myself, and I sent me here.(so did numberphile and other youtube channels but that is beside the point. The point is i am here now)

[@josh18230]

It works with 9 too. You only have to deal out twice.

[@McHale09]

Nice Sonic Teacher

[@Leishmaniasisably]

Ha... Matt is ON Numberphile, but he's a comedian in the UK. Saying he's "from" there is kind of misleading. But yeah, you're right.

[@duckieace]

anybody have any methods in memorising the order?

[@MrGuidesman]

Isn't Matt from Numberphile?

[@FiatLux47]

Bottom-bottom-top is correct for 9, I just tried and it works. Watch the video again, maybe you're not dealing the cards correctly or something like that...

[@Balin0906]

what's the hidden password for the "secret page" on mathematical magic? I allready went through the pdf manual and it's driving me CRAZY xD

[@Pixelhurricane]

there are only 27 cards in the deck so you need to specify withing 1-27

[@russiannixon475]

Is there a chart of sorts that has the conversions to base 3?

[@404lt]

yes

[@Balin0906]

Ah got it :-D I'm not even mad that the "prize" is allready gone. Just glad that I can sleep tonight! ^^

[@vaibhavkothari9086]

What prize ?

[@Leishmaniasisably]

Numberphile brought me here!

[@Autobots200]

the guy from numberphile.

[@FiatLux47]

Well I deal them as in the video dude ^^ Try with 8 and do exactly the same moves as the guy in the video, since it was 8 for him. And check that it works.

[@Anonymous01959]

you had time to give a better explanation of how to position the card.

[@jerusai4631]

its not working on the number 23!

[@Thebicyclestory]

Actually it was my mouse, not Jay!

[@Gytax0]

I know you from numberphile!

[@derekja8o]

same here

[@michaelsnickers3910]

Gotta go fast

[@ShockTheMonkeyBand]

I sent mismag here.

[@chickensouplover516]

He has a sonic the hedgehog shirt!

[@HaZzM22]

so what if he's fav number is 29

[@MasterMagician991]

love your trick a lot sub like fav

[@L4Vo5]

Lets admit it This video has more views than the others because of Vsauce

[@SamBellows]

+L4Vo5 and gained at least my subscription. :D

[@Thecawesomeone]

+L4Vo5 Actually, it had around 40 000 views before Vsauce showed the channel.

[@L4Vo5]

Thecawesomeone no way! how could a video with more than a million views not get this video more than 5000 views?

[@Thecawesomeone]

L4Vo5 I thought the same thing. I'm hoping it's just that the view count hasn't been updated.

[@sdelavega15]

...It's not for the card. It's for the person's favorite number.

[@MustafizC]

oh so your mouse controls you? lol

[@M6Cuerdas]

My hand send me here.

[@Kermitnirmit]

he said between 1-27

[@thecarpetguy9]

:D mismag822 commented!

[@GamingAssistant]

vsause sent me here

[@MustafizC]

mismag sent me here...

[@TopGunner4411]

mismag, vsauce and numberphile!!!

[@robertosoler2444]

In spanish please....

[@CanniCake]

He didn't use brackets.the trick consists on the first cut to put it bottom if 3,6,9... middle if 2,5,8... top if 1,4,7... Hope you can figure out the others because i don't feel like writing everything down. Too tired.

[@getsomebud]

My mouse sent me here.

[@derekja8o]

yeah 8 isnt cubed

[@atlimagician]

mismag and vsauce sent me here

[@macrocefalo007]

vsauce sent me here, and i see the one from numberphile, what the fuck

[@louielego]

I took me 3 hours to get this trick

[@alexsh4517]

+Lubricantjelly You my friend need a brain surgery, to see what's the problem inside.

[@bruh8607]

lol

[@Rockwarrior2004]

what if someones favorite number is 99?

[@justinmathey8091]

umm im an idiot please could u message me a simple version of this?

[@nikishguorrub6917]

it's not your favorite number!!!!

[@MRawesom100]

hhhhhhhh me too!!!!

[@TeamBosFishing]

That trick is old ..

[@larwhelan]

It's not good enough to put the effort in to learn it

[@atlimagician]

mismag and vsauce sent me here