Five science quizzes, one life in each: the human body, life science, physics and space, inventions and chemistry.
Shortest first, longest last. The board is the plain count of questions you get right across all 5, and the shorter clock takes a tie. A game played on its own still counts toward it, but you need all 5 in the same day to take a rank on the circuit board.
The same 5 games every day, with new puzzles in each of them at midnight Eastern.
See all the circuits