The individual winner was Ruoyi Jiang of East Setauket, Long Island. His project examined resistance to chemotherapy drugs.
The winning team of Sean Karson, Dan Liu and Kevin Chen collaborated on a project that shed new light on a 30-year-old math problem in the field of graph theory.
Karson lives in Winter Park, Fla. and his teammates live in Texas. They communicated by e-mail and Web-cam.