OC Math Circle will host the AMC 10/12 A virtually for all eligible students. For AMC 10/12 A, students must be grade 10/12 or below and also under 17.5/19.5 years of age on the day of the competition. The cost of registration is $20. Registration ends on Tuesday, January 12, 2021 at 12 PM PST. AMC 10A has reached max capacity and is now closed.