Maths Card Trick: Last to be chosen

A maths card trick. From a shuffled deck of cards, pick a number between 1 and 10, a count up to find your first chosen card. The value of your chosen card is your new number. Count up again to find your next card and continue through the whole pack. The magician will reveal your last chosen card.

Category:

Education

Tags:

• maths
• math
• mathematics
• problem
• puzzle
• cad
• trick
• magic
• kruskal
• count

[emeemmanuel]

yes it was 9!!!

[101animations]

no, mine was 4 of hearts

[alfiestoppani]

did anyone who picked 4 at the start regret it when the string of 4,5,4,5,4,5, came up? <:3D~

[thepowerofmagic2]

jack of diamonds



[Jarod3926]

no friends?

[randominfo316]

No I got a 4

[singingbanana]

@zantiertasa I also wrote a little article about the trick. The link is in the response video description.

[zantiertasa]

@zantiertasa just watched the video response... *face palm*

[zantiertasa]

Hey, I've written a quick program to generate the outcomes for input or random shuffles! It has verified that in the video's example, every number from 1 to 10 gives 9 of spades.

BUT, my program gives frequent examples of there being 2 possible answers. Here's one of those examples (suit is irrelevant): A 6 5 5 J 10 Q 8 8 10 9 4 A 9 J Q 7 Q 5 2 J 2 3 10 Q 6 A 5 K 9 7 4 4 8 7 3 K K 8 2 6 4 2 K J 3 3 10 9 7 A 6

Choosing 1, 2, 3, 6, 7 or 8 lead to card value 7

whereas 4, 5, 9 and 10 lead to 9.

[luigi90900]

Hmmmm... 1.5 works.

[CDawgTV]

mine was the 5 that you had in your hand and almost chose