Hamilton-Wenham Regional High School defeated Sharon, 530-195, in a "High School Quiz Show" first-round match, which aired Sunday night.

Defending state champion Hamilton-Wenham advances to face Brookline in an episode airing April 8. The state championship episode of the Emmy-Award winning fast-paced academic game show airs May 20.

Sunday night's episode was a rematch of last season's Eastern Mass. semi-finals, which Hamilton-Wenham won, 295-210.

Sunday night, Sharon led, 180-120, after the toss-up round, the opening round, where each correct answer earns 10 points, but teams aren't penalized for incorrect answers.

But, Hamilton-Wenham took a 200-180 lead after the head-to-head, which pit one player from each team against each other for 90 seconds, with each correct and incorrect answer worth 10 points.

Hamilton-Wenham expanded its lead to 450-235 during the categories round, featuring six categories of five questions of increasing value: The Fab Four, Fashion Statement, What the Dickens!, Ship Shape, The Cold War and Galaxy Quest.

The contest ended with a 90-second lightning round, with each correct and incorrect answer worth 20 points.

Sharon's on-air team included junior Hari Anbarasu and sophomores Peter Riley, Siddharth Singh and Clara Mao.

This season's 16 schools scored the highest among 78 schools taking a 100-question oral quiz at WGBH's Brighton studios on Oct. 30.