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March 31, 2004

The Bixby Boys

It was the first day of class and Mrs. Feldman had two identical-looking pupils, Ben and Chris Bixby, sitting together in the first row.

"You two are twins, I take it?" she asked.

"No," they replied in unison.

But a check of their records showed that they had the same parents and were born on the same day. How could this be?

Adapted with permission from Mathematical Puzzles: A Connoisseur's Collection by Peter Winkler. Copyright © 2004 by A K Peters, Ltd. See www.akpeters.com/book.asp?bID=197.

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