Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
{1, 2, 3, 4, 5}
{0, 1, 2, 3, 4}
{1, 2, 3, 4}
{1, 2, 3, 4, 5, 6}
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.