By Richard LeComte
LEXINGTON, Ky. -- Pick an integer -- any integer -- between zero and 15. Then look through the special cards Richard Ehrenborg has up his sleeve. Not only can he use the cards to figure out what number you picked, but he can do it even if you lie once, through mathematical principles.
Doesn’t add up? Oh, but it does. To explain the trick, Ehrenborg takes readers back to code corrections in transmitting data over communication networks. He uses his cards to explain key mathematical concepts to his students.
“I teach math majors and computer science majors about this math, so I wanted to show them these applications,” Ehrenborg said. “All this information technology, number theory and