[Slick]

Ok, here's neat little puzzle...

You have 2 egg timer sand-type "hour" glasses. One measures exactly 4 minutes, the other measures exactly 7 minutes. You are making a recipe requiring exactly 9 minutes. How do you time it.

Answers to all the weasel questions:
no you can't estimate times
no you can't lay one down on its side
no fancy stuff, this is not that hard.

Slick.