Every quiz pulls a fresh random set each time you take it, so retaking one is never just memorizing the last run.
37 correct (74%) is a pass, matching the actual FCC threshold. Take it as many times as you'd like — every attempt pulls a fresh random set. Purchase the Extra course to unlock it.
Every question in the pool, not split up by module — submit-and-check test mode, or flip through as flashcards for last-day review. Every miss links straight to the module that covers it. Purchase the Extra course to unlock it.