Q: How many different solutions are there to a sudoku puzzle?
A: 5,472,730,538, not including symmetrical solutions. Including all the different symmetrical solutions, the answer is 6,670,903,752,021,072,936,960. Either way, it's a lot.
Q: How many atoms in a guacamole?
A: Avocado's number.
How is it possibile that three people could compete for a beauty contest and each one receive a majority of votes?
One of my favorites:
What is the radius of the Earth?
This is a question that I consider of utmost importance. I like to ask it at all information booths I find. The answer is approximately 6000 km. This has far-reaching implications. (Get it? far-reaching heh)