Mathematics enthusiasts from Gwinnett County Public Schools will come together this weekend as they compete for the title of Witzzle Pro Champion. The GCPS annual “Witzzle Pro Tournament” is a mental math game that tests students’ knowledge of numbers and operations. This year’s tournament takes place Saturday at Stripling Elementary, 6155 Atlantic Blvd., Norcross. The competition begins at 9 a.m. The winning school will have the honor of holding the GCPS Witzzle Pro trophy until next year’s tournament.