A Mathematical Card Trick

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singingbanana

singingbanana

Күн бұрын

Пікірлер: 86
@jorlando2001
@jorlando2001 2 жыл бұрын
Here is possibly a simpler explanation: By now everyone knows that you memorize the 7th card dealt out. Since the deck is flipped over, that becomes the 7th card from the top of the deck on the table. The method used to create the columns ensures that the sum of the showing cards plus the total number of cards in the columns always equals 33. For instance, if three face cards are dealt, then the sum is 30 (10+10+10) and you would not put any more cards into the columns, so there are only 3 total cards in the columns, and 30 + 3 = 33. (value of showing cards) + (number of cards delt) = 33 This is the key, because it means that the sum of the cards showing is in a strict relationship with the number of cards dealt. As the sum of the cards showing goes down, the number of cards dealt goes up by the exact same amount, and visa versa. Since you are subtracting the number of cards dealt to the columns from the pile in your hand, it also means that the sum of the cards showing is in a strict relationship with the number of cards remaining in your hand. As the value of the showing cards goes down, the number of cards left over in your hand goes down by the same amount. If the value of the showing cards goes down by 3, you also end up with 3 fewer cards in your hand. Now, 7 was chosen because 26 + 7 = 33. Remember that the pile in your hand starts at 26. Essentially, the value of the cards showing is subtracted from BOTH ENDS ends of the equation to preserve the equality. Again, it is both ends because the value of the cards showing moves in proportion to the number of cards in your hand, and so influences both the first number (the number of cards in your hand) and the final number (the sum) in the same way. That is: If the sum of the three showing cards equals 30, then you must have dealt 3 cards from your hand, leaving 23. 23 + 7 = 30. Both sides are dropping by 3. If the sum of your showing cards equals 27, then you must have dealt 6 cards from your hand, leaving 20. 20 + 7 =27. Both sides are dropping by 6. 33 was chosen because 30 is the maximum sum due to 10 being the highest card value and 3 is the minimum number of cards given three columns.
@josephchividian
@josephchividian Ай бұрын
So basically you're saying this is an algebra based math trick? Except you don't solve for x cos you already know it
@kurtisvieth6462
@kurtisvieth6462 11 ай бұрын
7th card in deck is the one that adds up. when you count up I always put a 10 or over on top of the old pile, the math still works
@singingbanana
@singingbanana 14 жыл бұрын
@MsOfficeman Good point. If you get stuck like this you would have to say "whoops! We've run out of cards. Let's use some of the cards from the pile we discarded." Continue counting using cards from the top of the discarded pile. You should be ok again.
@MrPibb23x
@MrPibb23x 3 жыл бұрын
When I do this trick I deal the counting cards face up so that it seems like you're using those cards to 'divine' the card you're predicting. Even though you know it seconds into the trick it's a lot more fun to sit there and say "The 15th card is the... hmm... nine of... diamonds," while looking at the cards as if they're saying something.
@singingbanana
@singingbanana 14 жыл бұрын
@MsOfficeman I'm not convinced we should allow Ace to be a picture card... but it's still quite unlikely - and we know how to fix it :)
@Error081688
@Error081688 15 жыл бұрын
The 7th card laid down in the first half-deck is key. The three stacks can be written as [11-a], [11-b], and [11-c]. The 2nd half-deck after those piles are removed is expressed 26-(11-a+11-b+11-c) which is equal to -7+a+b+c. Now that pile is added to the first half-deck of 26 making it equivilent to 26+(-7+a+b+c) or 19+a+b+c. Now an amount equal to a+b+c is removed from that half-deck. So, the resulting card will always be the 19th card down from the first half-deck, or the 7th card up
@jorlando2001
@jorlando2001 2 жыл бұрын
One quick addendum. If you happen to deal out three aces for the top cards of the three piles, then you will need to deal out 30 cards from the pile in your hand. But the pile in your hand only contains 26 cards. This is a problem for any combination of top cards that add up to less than 6. But if you run out of cards in your hand, take the top cards of the other deck to finish the three columns. The trick will still work. You will just be counting down less than 7. For instance, if the three cards are aces, then you will need to deal out 30 cards into the columns. You will borrow four cards from the other stack to make up the difference between 26 and 30, leaving the guessed card at position 3 (7-4=3). Your three aces add up to 3, and so you will still count down correctly.
@muhammadharithzaeefkhairul1953
@muhammadharithzaeefkhairul1953 Жыл бұрын
What happened if the top cards are Queens or Kings?
@Error081688
@Error081688 14 жыл бұрын
@higafujiyoshi Well, the 19th card down is also the 7th card up as he is putting the cards down initially. So, as he is counting the cards in the beginning (1, 2, 3, etc), he quickly memorizes the 7th card.
@Massiah82
@Massiah82 13 жыл бұрын
its 11... every column uses 11 cards J = 10 cards discarded + 1 card layed out. 5 = 5 cards discarded + 6 cards layed out 7 = 7 cards discarded + 4 cards layed out 33 in total = 26 + 7 Its the 7th card in the 2nd pile. Nice trick, must remember that for the future :P
@reeceoverstreet4538
@reeceoverstreet4538 Жыл бұрын
The better trick to this is revealing 24 cards face up from a full deck, pick the 5th card, then put those on the bottom of the deck, then from the top of the deck place 3 cards face, then make 10 on each of the three cards, then add up the 3 cards and lay down that many cards with the last card being the 5th card from earlier....very simple to execute almost mind boggling trick...it just works everytime
@Error081688
@Error081688 14 жыл бұрын
@elizze6 Well there is probably a more elegant way to describe it, but 11 was really just an observed constant. I thought, if the first card of that pile is a 10, how many cards will be in that pile? 1. What if that card was a 3, then how many cards will be in the pile? 8. So what theory can I form that fits these data points? 11-(the first card number)=(total number of cards in the pile). That equation holds true for every possible value for the first card and so it will always be true.
@loverofallanime101
@loverofallanime101 15 жыл бұрын
this was the second math trick i learned
@illustriouschin
@illustriouschin 13 жыл бұрын
I... don't even own a deck of cards.
@killeramaru
@killeramaru 13 жыл бұрын
Where is the tutorial!
@oeneboy
@oeneboy 14 жыл бұрын
Great, now split the deck in two halves with the backside up.
@elizze6
@elizze6 14 жыл бұрын
@Error081688 The only thing I'm confused about is where the number 11 comes from. How can you be sure that every time you do it there will be a total of 11 cards amongst the 3 piles? And if you can't be sure of the 11, then how would you know that a b and c add up to 22, to get the -7 and then the 19?
@DarkLord666SK
@DarkLord666SK Жыл бұрын
Once when i was drinking with a mate he explained me an excelent mathematical way of guessing the number and color.. i forgot it ... and it realy worked by counting the cards
@khvikas1
@khvikas1 11 жыл бұрын
so simple..i know this since my childhood..just remember the 7th card while counting the 26 card...and whatever the final sum is..that card will come as a result of that sum...
@trialanderror620
@trialanderror620 13 жыл бұрын
but mathmaticly, where did the nine come from?
@senken12
@senken12 15 жыл бұрын
He memorized 7th card when counting out. the 26 he used to make piles = piles of: 1, 6 and 4 = 11. 26-11=15 10+5+7 = 22 22-15 = 7
@1mbA4ever
@1mbA4ever 11 жыл бұрын
If someone is still watching this even though it's now almost 5 years old, I will give you the solution to this one. First off all: you have 26 cards in on half of the deck. Yes - 26 is important! Now look at the possible solutions: if you have a 10 - you skip 10 cards. if you have a 9, lay 1 card down and skip 9 cards. So in general, you skip n cards and lay down 10-n cards - so summed up you'll always "cancel" 10 cards. You do this 3 times. You know you had 26 cards, but you lay 3 down without counting them out - therefore 23 cards in your half left. The remaining cards will be layed ON TOP of the other deck. You will ALWAYS get to card number 7 of the first stack you counted down. That's the only card that you have to memorize to solve this. You can rewind and D9 was the 7th card of the other deck.
@1mbA4ever
@1mbA4ever 10 жыл бұрын
PhDyMy Thanks for your nice reply - I really like the way you started the comment. anyway, with "cancel 10 cards" I mean that the sum of the cards you lay down or skip will ALWAYS be 10. Let me give you an example: 10 or a picture-card: you add 10 9: you lay 1 card down and will later add 9 - 1+9 = 10 8: you lay 2 cards down and will add 8 - 2+8 = 10 so this will ALWAYS happen which is exactly what I tried to explain. English is not my first language, sorry for not being on spot every single sentence. tl;dr: It doesn't matter what cards you lay down - memorize card #7 and you're done.
@1mbA4ever
@1mbA4ever 10 жыл бұрын
PhDyMy If you're trolling me that's fine. ANYWAY ADDING CARDS PART FOR DUMMIES 1) You lay down a card: card with a value of 10. What will you do now? Well you ignore that card for now - you don't lay cards on top of it. 2) Then next: you lay down a card and it's a 7. What do you do now? You lay down 3 cards face down. 3) Then: you lay down another card (so exciting) and it's a 5. What do you do now? You lay down 5 cards face down. now... let's hope it's so brutally obvious that I don't even have to explain it anymore, but let's do it for the sake of it. (1) You take 10 and add 7 (2) and then you add 5 (3). What value do you get? 10+7+5=22. How many cards did you lay down face down? 3 (2) + 5 (3) = 8 Now add 22 and 8. If you calculate that correctly you get 30. Now take a look at it step by step: (1) 10 = 10; (2) 7+3 = 10; (3) 5+5 = 10 can't explain it any other way.
@SwatiDesaiLaw
@SwatiDesaiLaw 10 жыл бұрын
lol
@TopShottaFYC
@TopShottaFYC 8 жыл бұрын
Hey man can you make an instructional or tutorial video of this card trick I'd really love to know how it's done
@rjordist4925
@rjordist4925 5 жыл бұрын
but whats the formula of this trick. why the total of 3 characters always be the accurate first 7 in the first deal.
@kiarashBanihashem
@kiarashBanihashem 11 жыл бұрын
how did you do it?
@hansen704
@hansen704 2 жыл бұрын
Great card trick. Thanks 👍
@david11donze
@david11donze 11 жыл бұрын
what deck do you use?
@ftooc
@ftooc 14 жыл бұрын
You just memorise the 7th card you put down, at 0:20 it is the 9 of diamonds. Then the maths does the rest. That's brilliant! But you have to make up a reason for choosing the 9 of diamonds which wasn't so brilliant. But it is still good though, I like it.
@Tanukosauro
@Tanukosauro 9 жыл бұрын
- 1 year ago: "How can you control the 9 of diamonds in the 7th position from the bottom!? Good one :)" - Now: Got it, 26 + 7 = 33 :)
@crazymurdav
@crazymurdav 15 жыл бұрын
So wait, i kept doin this trick and never got it to work. Are the other comments right, is he just in fact memorising the cards when he originally deals them?
@themaskedcrusader
@themaskedcrusader 13 жыл бұрын
That's a tricky bit of maths there. But maths are only part of it.
@rafsoverflow
@rafsoverflow 14 жыл бұрын
@crazymurdav he learns seventh card only, in this case 9th of diamonds. the rest gets done by the math
@dpeatt
@dpeatt 15 жыл бұрын
he memorised the 7th card while he was counting out 26 cards i know this trick
@Starculation
@Starculation 7 ай бұрын
I don’t get it. I know you have to memorise the 7th card in order for the final result to be 33. But don’t the cards have to add to 19. Because then 26 - 19 = The 7th Card 🤷‍♂️
@Starculation
@Starculation 7 ай бұрын
Nevermind, I lost 2 cards, that’s why it didn’t work 😂
@ibeat99
@ibeat99 14 жыл бұрын
hmmm "i have 3 piles here so ima say the 22nd card is a nine..." 3 piles doesnt explain why you would pick a 9 so its just making up stuff to get to a certain card in the deck which is memorized
@linaya12
@linaya12 15 жыл бұрын
a little frantic, but cool
@magician2242
@magician2242 15 жыл бұрын
Cool trick and very easy to do
@tony19o8
@tony19o8 13 жыл бұрын
@singingbanana it is not a math trick he just sees the 4th or whatever card he wants when he splits the deck and thenjust makes up a story
@theseekwool
@theseekwool 15 жыл бұрын
didnt get it at first but Error081688 prett ymuch reveals the trick!!! Awesome explanation...Thanks
@naseemshaafi4359
@naseemshaafi4359 6 ай бұрын
1:30
@breakdancer100
@breakdancer100 15 жыл бұрын
haha thats cool i never knew that before let me go show perform it somewhere
@Leyouz76
@Leyouz76 14 жыл бұрын
my favourite ^^
@mustafa8990
@mustafa8990 14 жыл бұрын
how do you know the card was 9 , could you please do another vedio explan it two times. thx
@wolfdemon656
@wolfdemon656 15 жыл бұрын
i don't get how you predicted the nine. :(
@amycristine269
@amycristine269 Жыл бұрын
I still don’t get it. What am I missing? I’m good at this stuff. I feel like Vinny.
@ollesimba
@ollesimba 13 жыл бұрын
Okay, I got it and I got 9 every time but how the heck did you know it was diamond 9?
@bugshirt4
@bugshirt4 13 жыл бұрын
@goldstud you're making it way to complicated. the card is always in the same position, and he counted out the cards face up...
@xKargatx
@xKargatx 15 жыл бұрын
how do you do that? O.o
@amiratachaba5676
@amiratachaba5676 3 жыл бұрын
Can anyone give me a math explination ?
@mihaitzan
@mihaitzan 11 жыл бұрын
i don;t understand why you choose 9
@robertclark4929
@robertclark4929 8 жыл бұрын
What if your bottom pile cards are 10s it wont work.
@yoyocraze1
@yoyocraze1 13 жыл бұрын
after reading the comments my head hurts
@Elerai77
@Elerai77 15 жыл бұрын
Well, We've got 3 piles here so I'm going to say that the card is a nine. Hope that helps.
@LtDanw
@LtDanw 11 жыл бұрын
how?
@praenomen6290
@praenomen6290 4 жыл бұрын
I think this is the video referred to in "Are Matt and James anti-psychic?"! Found it in less than an hour! ... Maybe not. Not sure.
@ericryberg5888
@ericryberg5888 4 жыл бұрын
Some one smarter than me, whats the mathematical equation for this card trick?!
@TheTarheelz
@TheTarheelz 15 жыл бұрын
yeah mismag822 revealed this same trick.
@Shadoslicer
@Shadoslicer 15 жыл бұрын
i dont understand why you picked 9
@SuperDonkeyKong89
@SuperDonkeyKong89 13 жыл бұрын
I know how u do it. You just remember the 7th card when you are dealing the first 26
@charliesanchez7123
@charliesanchez7123 8 ай бұрын
how did he get 9
@killeramaru
@killeramaru 13 жыл бұрын
I have been waiting for a tutorial on this for sooooooooooooooooooooo long!!!!!!!
@nurikanana
@nurikanana 15 жыл бұрын
Hey There . i know this trick . My uncle told me the trick . it was easy as ABC !
@meherbabagod3732
@meherbabagod3732 Жыл бұрын
💘💘❤❤💖💖
@cooIerthnu
@cooIerthnu 15 жыл бұрын
hmm.... when you first started laying down cards the 9D was the seventh card
@TKDJayJay
@TKDJayJay 13 жыл бұрын
A load of you are trying to sound really posh, using big words and over-complicating the simple solution that is - memorise the 7th card you put down when counting out the 26 cards, and then the total of the three cards you put down later, in this case the Jack, the 5 and the 7 - so the 22nd card is the 7th card u memorised. Its one of those tricks that works on its own sorta thing, but to explain how it works would be over complicating the simple fact ;)
@rudjard18
@rudjard18 15 жыл бұрын
wish im a mathematician.. :[
@D2iccy
@D2iccy 14 жыл бұрын
how did you get 9 lol?
@Silentsouls
@Silentsouls 11 жыл бұрын
On the cruicial part his hands move out of the frame, dont know it that has something to do with it.
@flicksbyjb
@flicksbyjb 7 жыл бұрын
Silentsouls no. Its mathematical. Anyone can do it.
@lemoncouch1
@lemoncouch1 14 жыл бұрын
Look aces count as one. THEY DO NOT WORTH 10 THEY ARE WORTH 1!!!! SO IF U GET IT THEN ADD 9 TO IT OK?!!? ALWAYS WORKS TRUST ME
@goldstud
@goldstud 13 жыл бұрын
@singingbanana hmmmmmm I know how the trick was done, lol because you see as I watched this video I noticed 1 very important thingyou you grabbed the top half of the deck you first counted out you quickly went off screen with it and came back very fast with a pac that looked MUCH thicker than it was telling me when you took the pack off screen you switched it with a preset pack with the 9 of diamonds already in the 22nd position and you knew it was the 9 of diamonds aead of time, lol
@PirateMetalFTW
@PirateMetalFTW 15 жыл бұрын
@Shadoslicer 7th card in the pack
@ianmcauley1
@ianmcauley1 15 жыл бұрын
it's easy, it's a different deck, when he picks the deck up he swaps it for a rigged deck, XD
@killerbrogaming2845
@killerbrogaming2845 8 жыл бұрын
this doesn't work
@dietrichd1
@dietrichd1 14 жыл бұрын
RIGGED
@jordanmcgahan7935
@jordanmcgahan7935 11 жыл бұрын
I figured the card trick out I will put a link for the tutorial and I'm only seven years old
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