NDA examination is conducted by UPSC, like other UPSC exams NDA too has a vast syllabus. NDA covers almost every subject that a student studies from primary classes to senior secondary. So, the syllabus without a doubt becomes a mountain cliff to reach. Each subject needs a different approach and strategy of studying. Knowing how one can study a particular subject efficiently can save their precious time and efforts.  Aryabhatta once said “Maths is an ocean, and my knowledge is just a drop, and I have to practice and practice”. When someone like Aryabhatta needed to practice Maths daily, then