How many practice questions do you actually need?

Candidates ask for a number, providers quote one, and the number is close to meaningless on its own. Two thousand questions answered carelessly is worth less than six hundred answered with a review habit. Still, the question behind the question is a fair one: how do I know when I have done enough?

If the question you meant was how many items are on the exam, that is a different number: 180, in two timed sessions. The format is on how many questions are on CFA Level I.

Three things a question count has to satisfy

1. Coverage

Level I has ten topics and well over sixty distinct subtopic areas. If you want a realistic chance of having met every idea at least a few times, you need enough questions that each subtopic gets somewhere between fifteen and thirty. That arithmetic alone puts a serious preparation somewhere in the region of 1,000–2,000 questions, not because the number is magic, but because anything much smaller leaves entire areas you have seen once.

Note what this means: a thousand questions concentrated in the topics you enjoy is not coverage. The subtopic breakdown matters more than the total.

2. Repetition of your own mistakes

The questions that improve your score are the ones you got wrong. Answering a new question you get right confirms something you already knew; re-answering one you got wrong, a week later, is where the change happens.

A practical target: every question you get wrong should be seen again at least twice, at increasing intervals, and at least one of those repeats should be close to the exam. If your study tool cannot show you a list of everything you have got wrong, you are missing the highest-yield material you have.

3. Diminishing returns you can actually observe

Stop asking how many and start watching the curve. Track accuracy by subtopic over time. Early on it climbs quickly because you are fixing genuine gaps. Later it flattens, and once a subtopic has been flat for two or three sessions, more questions there are close to worthless. Move the time to a subtopic that is still moving.

What the count does not tell you

• Difficulty mix. A bank made mostly of recall questions inflates your accuracy and your confidence at the same time. Real exam questions apply a concept to a short scenario.
• Distractor quality. On a well-written question the wrong answers are the ones you would reach by making a specific, common mistake. On a badly written one they are obviously wrong, so you score well without ever discriminating.
• Whether the answer keys are right. This is the one nobody checks, and it is the one that can actively damage your preparation.

A workable rule

Aim for roughly 1,000–1,500 questions across a full preparation, distributed by exam weight rather than by preference, with every wrong answer revisited at least twice. Then judge readiness on timed mock exams, not on question count.

You can see the style and difficulty for yourself: ten free questions per topic, with the reasoning for every option.