... 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]

Contentious | Vocabulary | Khan Academy

15 Powerful Mindset Shifts

View All

Calculating a P-value given a z statistic | AP Statistics | Khan Academy

Fay read an article that said 26% of Americans can speak more than one language. She was curious if this figure was higher in her city, so she tested her null hypothesis: that the proportion in her city is the same as all Americans’ - 26%. Her alternative…

How to Build RELIABLE Passive Income for 2022

So back when I was at uni, four or five years ago, I remember having this moment where one day I searched for physiotherapy jobs in my city. It was at that exact moment of my life I realized I was never really going to make all that much money as a physio…

Fourier coefficients for sine terms

Many videos ago we first looked at the idea of representing a periodic function as a set of weighted cosines and sines, as a sum, as the infinite sum of weighted cosines and sines. Then we did some work in order to get some basics in terms of some of the…

Volume density

In this video, we’re going to talk a little bit about density, and we’re especially going to talk about density in the context of volume. One simple way to think about density is it’s a quantity of something, and we’re going to think about examples of it …

Parents: See how to get 24/7 homework help with Khanmigo | Personal tutor | AI Tutor

Hey parents, do you need help with your child’s homework? Let me show you how Kigo can help with homework today. So, I’m in Kigo and I’m in the activities tab, and I’m going to use the “Tutor Me” feature. All you have to do is, you or your child can copy…

Potential energy | Physics | Khan Academy

If you drop a basketball, then it’ll speed up as it hits the ground, right? Which means its kinetic energy increases. Let’s say 100 joules just to take simple numbers, okay? The question is: where did that kinetic energy come from? Well, one answer could …

... and why!

More Articles