ELI5: Explain Like I'm 5

Branching theorem

So, imagine you have a big tree with lots of branches. Each branch has more branches coming off of it, right? Well, in math, there's something called the branching theorem that helps you figure out how many branches there are without having to count them all.

Let's say you have a tree with 3 branches coming off of the trunk (the big part at the bottom) and each of those branches has 4 smaller branches coming off of them. If you want to know how many branches there are in total, you use the branching theorem. Here's how it works:

- First, you count how many branches are coming off of each branch. In this case, each branch has 4 smaller branches attached to it.
- Next, you add 1 to the number of branches on each of those branches. So, for each of the 3 main branches, you add 1 to the 4 smaller branches, making it 5 branches.
- Then you multiply all of those numbers together: 3 x 5 x 5 x 5 = 375 branches in total!

Pretty cool, right? The branching theorem can help you figure out how many branches are on any tree with lots of branches without having to count them all!