If you like crossword puzzles, you've probably run into Bernice Gordon of Philadelphia.
Gordon, 99, is thought to be the world's oldest professional crossword-puzzle constructor, and has devised thousands of puzzles in a career spanning seven decades. She sold her first puzzle to The New York Times in 1952 and still creates a new puzzle every day.
"My head is clear," she says.
Gordon now constructs puzzles on a computer, and although she has an impressive reference library, she extols the virtues of Google.
Are math puzzles in her future? "I can't add 2 and 2," Gordon says. "I count everything on my fingers."
Next page: Check your answers! »