Fifteen original problems, arranged exactly like the real exam — easy to hard, every major topic mixed together so the patterns start to feel familiar on their own.
Note on format — the real AIME asks for a typed-in integer from 0–999 rather than multiple-choice options. This version keeps every problem, difficulty curve, and timing identical to the real thing, but presents each answer as four choices so it's easier to work through interactively — with a hint, the key concept, and a full explanation right after you answer.