Sunday, May 23, 2010

two puzzles

Two of my favorite puzzles that I've seen in the last few months:

The first is an optical illusion. See if you can figure out where the extra guy is coming from
(this should be a gif animation, if you don't see it moving click the link):

The second is a math puzzle. Say you have a bunch of balls of different colors moving the same speed in either direction around a circle. Any time two of them collide, they immediately bounce off each other and start going the same speed in the opposite direction. Take a snapshot of this system. Will the system ever look exactly the same again?

The answer is really simple when you see it. But think about it before reading about it here, in the first comment =)

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