Sunday, May 3, 2015

A Math Riddle

Here's a riddle. If you can solve this, I'll award you 5 bonus points.

Three men walk into a cafe and have lunch. Needing to leave early, they each leave a $10 bill on the table, knowing that it will easily cover the bill. Shortly after getting outside, the waitress chaises them down saying that they paid too much. She gives them five $1 bills to distribute among themselves. Not knowing for sure how to divide it up, they each take a dollar bill, leaving two. Then they start thinking, "We originally paid $10 each making it $30. Now by each taking a dollar, 3 people x $9=$27. We have just $2 left from the $5 the waitress gave us. What happened to the other dollar?"

See if you can figure out what happened to the missing dollar.

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