After a mock, it is tempting to look at the score, sigh, and move on to more practice. But a score tells you how much you lost, not why. And the why is usually not twenty different reasons. It is two or three, repeated.
A repeated mistake is good news. It means a single fix can recover points across many questions at once.
What a repeated mistake looks like
It rarely looks like a gap in knowledge. More often it is a habit:
- Choosing the same answer on Data Sufficiency whenever you are unsure.
- Spending too long on one hard question early, then rushing the end of the section.
- Reading the question quickly and solving for the wrong thing.
- Changing a right answer to a wrong one on review.
Each of these can cost several questions per section. None of them is fixed by learning more content.
How to find yours
- Take your last two or three mocks, not just the latest one. One test shows mistakes; several show patterns.
- List every question you got wrong, with how long you spent on it.
- Next to each, write one honest reason. Not the topic, the reason: did not know how, misread, ran out of time, guessed, or knew it but slipped.
- Count the reasons. The one that appears most is your first target.
One bad day is not a habit. Look for the reason that keeps coming back.
Then fix one thing
Pick the most common reason and practise against it on purpose, for ten or fifteen minutes a day. Then check it on the next mock. If it moved, pick the next one.
ChatGMAT reviews every mock you take and tells you the one thing to work on next.