It depends on:
-How many TEST questions you manage to pass,
-How many tasks you can do without being corrected once
-Both of them
-Other reason?

It is best to specialize in just one task that you are good at to begin with. Read the instructions more than once so that you really understand the rules of the task, and also the exceptions to the rules. It may not be a high paying task but the goal is to increase your accuracy.

If you are ready to start a new task, it is best to first check on the forum what other people are saying about it. maybe people are complaining about a lot of unfair corrections or flags. Better stay away from it then.

Yeah, I've been expelled from a lot of level 1 tasks, and now my accuracy is at 69.5%. Especially that 'direction of travel' one.

I'm asking because I recently passed a quiz with 100% accuracy, and I think that the 'test questions correct/answered' went from 169/246 to 170/246. Maybe I'm remembering wrong because those stats update every 24 hours as far as I'm aware.

EDIT: The specific stat is called 'Accuracy rate on *test* questions', so maybe the tasks themselves don't count, only the test questions?