Pacing — survive the timer

If a question takes more than 90 seconds, GUESS, mark it for review, and move on. There's no penalty for wrong answers. Empty answers cost more than wrong ones.

Pass 1: do every question you can solve in under 60 seconds. Pass 2: come back to the harder ones with what time you have. This guarantees you don't run out of time on easy questions.

Every wrong answer you eliminate raises your guess from 25% to 33% to 50%. Even on questions you can't fully solve, eliminating one or two choices makes a guess far more valuable.