Challenge:
You have nine ball-bearings, all of the same size but one slightly heavier than the others, though not enough to be detected by holding them. You have some balance scales and are allowed to do only two weighings of any number of ball bearings. How do you find the heavy one?
Because the week can be so stressful (if your week was half as bad as mine you know exactly what I'm talking about), here's a (nerd) joke that some of you might get!
Descartes walks into a bar
The bartender asks if he wants a drink
Descartes says "I think not"
And then he disappears
If you don't get it, look up the Latin phrase Cogito, ergo sum. There's your philosopy lesson for the weekend!
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A Riddle a Day -- 78 Logical and Mathematical Puzzles
RandomSome riddles and brainteasers to give you a little something to think about each day!
