Question

Pick any number. If that number is even, divide it by 2. If it's odd, multiply it by 3 and add 1. Now repeat the process with your new number. If you keep going, you'll eventually end up at 1. Every time.

Answer 1

4/2=2+1=3x3=9+1=10/2=5+1=6/2=3+1=4/2

Answer 2

That is pretty darn cool.