Does anybody know any good Brain Teasers?

Question

I'm looking for good brain teasers. There are a lot of good websites that I have looked at, but I'm looking for sosmething new. Does anyone have a new, completely original one for me?

Answer 1

There are eight balls that look exactly the same but one is lighter. You have a set of balances. What is the least number of weighings that you need to find the light ball.

The answer is two. Tomorrow at 8:00 am EST, I will tell how it's done.

Bryan

Answer: take six of the eight balls and weigh them. If they balance, weigh the other two balls

If they don't balance, take two balls from the lighter side. If these balls balance, then it is the other ball.