The CBSE class 12 exams score for various students increased by 40-50 marks after re-totalling or verification. In one case, a student's mathematics marks increased from 50 to 90 after re-totalling. Another student's marks in economics increased from 9 to 45. Notably, CBSE only allows re-totalling of marks, while revaluation of answers is done only after a court’s order.