Tuesday, September 11, 2007

496 days, 20 hours, 59 minutes, 51 seconds

On www.whitehousekids.gov she finds The White House issued a math challenge for kids in elementary school:

How many Marbles?

* What is the smallest number of marbles when: grouping the marbles by fours leaves 2 extra marbles, grouping by fives leaves 1 extra, and there are more than 10 marbles in the collection?

Contest problems and answers are provided by David Rock at Columbus State College and Doug Brumbaugh at the University of Central Florida.