In math subjects, especially, you have to be careful about questions you have already done wrong about once.

Mathematics is a subject that solves a given problem based on mathematical thinking skills. When solving a math problem, a learner first thinks of a way to solve the problem, and then solves it according to the solution procedure.

Therefore, an ‘incorrect answer’ in a math subject indicates a failure in finding a way to solve a given problem.
However, even if you re-learn how to solve a problem for which they couldn’t solve accurately, you do not have the thinking power to solve the problem, so it is necessary to study the type that was already wrong more carefully.