The real multiple-choice section, on the real clock.

60 questions · 90 minutes · about 1:30 a question · every unit, weighted like the exam

• The clock doesn't stop. It starts when you press Start and runs for 90 minutes. You can leave and come back — your answers are saved — but the clock keeps running while you're gone, and at 0:00 the section hands itself in.
• Pick, then save. Tapping a choice only picks it; Save commits it. You can change a saved answer any time before you submit.
• Move around freely. Jump to any question from the grid and flag the ones to come back to. The review screen lists what's blank and what's flagged before you submit.
• No hints until it's over. No right or wrong, no topic names. Then: your score out of 60, the AP score it points to, your pacing, and every miss explained.