yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

... and why!


less than 1m read
·Nov 10, 2024

The reason this trick works every single time is elegantly simple. It has everything to do with the fact that their chosen card will always be in a pack that is third from the top.

That's because we had them take the pack containing their card, see? There's Boron, and put it on one of the piles. Then we had them put two more piles on top of that one.

So this stack is in order: pack number one, pack number two, pack number three, which contains their card, and at the bottom, pack number four. When they deal the cards out into rows, they are changing the packs into layers.

See, here we go! We've got 1, 2, 3, four cards. These are the cards that made up pack number one. Here comes pack number two; it is now becoming the second layer.

The third layer will be the components of pack number three, including Boron, their card. So when they finish and take the pack containing their card, because it is part of the third layer, it will be the third from the top, which means it will always be the third card from the left. Boron. [Music]

More Articles

View All
What is net worth? | Financial goals | Financial Literacy | Khan Academy
In this video, we’re going to talk a little bit about net worth. So, let’s just start with a question: if someone told you that they are worth $100,000, what does that mean to you? What do you imagine? So, let’s think about it together. Let’s say we have…
Solving 3-digit addition in your head | 2nd grade | Khan Academy
[Voiceover] What I want to do in this video is go over some techniques for doing mental addition. Now, if I saw something like 355 plus 480, if you have some paper around, you could write these numbers down and do your traditional addition, but you might …
Ocean acidification | Biodiversity and human impacts | High school biology | Khan Academy
In this video, we’re going to talk a little bit about ocean acidification. As we’ll see, it’s all related to increased carbon dioxide concentrations in the atmosphere. We have talked about this in other videos, but we can see if we look at carbon dioxide …
Jessica Livingston at Startup School 2012
Hi everyone! This is so big league this year! I can’t believe it. We have like this team of people in the back helping. There’s real chairs, and look how many seats there are! This is so exciting. Um, I’m Jessica Livingston. I’m one of the founders of Y …
Justification using second derivative: maximum point | AP Calculus AB | Khan Academy
We’re told that given that h prime of negative four is equal to zero, what is an appropriate calculus-based justification for the fact that h has a relative maximum at x is equal to negative four? So, right over here we actually have the graph of our fun…
Introducing a Yearlong Celebration of National Parks | National Geographic
[Music] National parks are part of our DNA. It’s who we are at National Geographic. For more than 100 years, National Geographic has been committed to national parks. In 1916, we devoted an entire issue of National Geographic magazine to parks. We called…