Be one of the first ten people to take and tweet a photo of MoMath’s new Times Square jumbotron ad, and you’ll win a free T-shirt! Just take a photo of the MoMath ad directly above Cold Stone Creamery at 42nd St. between 7th and 8th Avenues in New York City. (It runs once an hour, typically running between 15 and 5 minutes before the hour.) Tweet a link to the picture with the text @momath1. Then become a follower of @momath1 so we can send you a direct message with details about how to obtain your prize. Good luck and remember, Math Is Fun!