TNPSC Compound Interest Questions and Answers PDF: Aptitude and Mental Ability questions are more important for the TNPSC Group 1, 2, 2a, and 4 Examination. You will get 25 marks from that Aptitude and Mental Ability portion. Students who are preparing for the TNPSC Group 1, 2, 2a, and 4 exams concentrate more on the Maths - Compound Interest Questions and Answers part. you will easily ...