Maybe I'll ROT13 it for everyone.


Nice. That'll keep up the suspense for a little bit. I expect muzza will have a go at it...

SInce that one was too easy for you, try this one. It is another Car Talk puzzler.

A truck driver (tractor-trailer rig) has those big fuel tanks under his running boards. Each tank is two feet in diameter, a bit over four feet long, just about exactly 100 gallons per tank.

His fuel gauge has been broken since 1997, so he sticks the tanks with a yardstick to get an idea of how much fuel he has on board. He knows when the yardstick shows 12 inches of fuel, the tank is exactly half full, or 50 gallons.

But how much fuel is in the tank when the yardstick shows six inches of fuel? Obviously it is going to be considerably less than 25 gallons...

Now, this trucker doesn't remember how to find the area under a curve using calculus, so he came up with an elegant way, using simple math and household items, of getting a close approximation of fuel on board when the yardstick shows six inches of fuel .

How did he do it?

tanstaafl.