... 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]

CS50 Lecture by Mark Zuckerberg - 7 December 2005

Why I Stopped Spending Money

View All

Real Estate Revealed: How to AVOID Paying Taxes...(Legally, of course)

What’s up you guys, it’s Graham here! So have you ever wondered how so many people seem to avoid paying taxes legally? Of course, even though they might be making a ton of money. Have you ever wondered how you could avoid paying taxes legally, of course, …

Watch: Shipwreck Hunter Discovers 500-Year-Old Treasures | Expedition Raw

This is their earliest pre-colonial shipwreck ever discovered. It’s from the European Age of Discovery when Columbus, Magellan, and Vasco da Gama were going around the world. This is the Esmeralda shipwreck of Vicente Sodré. We have over 2,800 individual …

LIVE Office Hours with Sal (Monday, May 2nd)

Hello AP Calculus students! This is Sal Khan of the Khan Academy. As we all know, the AP Calculus exams, both the AB and BC exams, are coming up this Thursday, May fifth. I’m sure you are buzzing with as much excitement as I am. In case you didn’t alread…

Capturing the Iditarod - Behind the Scenes | Life Below Zero

We are here to document the lives of people living in Alaska. The harsh reality is the environment we’re up against. It makes it tough to do our job. Working on Life Below Zero can be very dangerous. Guns here, cameras; you never know what to expect. You …

The Power of Radical Acceptance

Some experiences weigh on us like a heavy cross that’s almost impossible to bear. They paralyze us with guilt or make us hide in shame. And in other cases, they leave us with an immense amount of pain for us to process. Many people either fight or stick t…

Identifying composite functions | Derivative rules | AP Calculus AB | Khan Academy

We’re going to do in this video is review the notion of composite functions and then build some skills recognizing how functions can actually be composed. If you’ve never heard of the term composite functions, or if the first few minutes of this video loo…

... and why!

More Articles