On this page
If you are in Class 12 and want both an engineering seat and a place at the National Defence Academy, you face two exams: NTA runs JEE Main and UPSC runs the NDA and NA exam. In 2027 they land close together. NTA's JEE Main 2027 information bulletin lists session 1 exam dates of 20 to 24 and 28 January 2027, and session 2 dates of 2 to 7 April 2027. UPSC's 2027 examination calendar puts NDA and NA Examination (I) on 11 April 2027.
How much of the NDA syllabus overlaps with JEE Main?
The NDA written exam has two papers: Mathematics for 300 marks and the General Ability Test (GAT) for 600 marks, each lasting 2½ hours, according to the scheme in UPSC's NDA and NA (II) 2026 notice. The calendar says the 2027 (I) notice is due on 2 December 2026; check it for changes.
The NDA maths syllabus has eight areas: algebra, matrices and determinants, trigonometry, 2D and 3D geometry, differential calculus, integral calculus and differential equations, vectors, and statistics and probability. NTA's JEE Main 2027 syllabus splits maths into 14 units covering most of the same ground, from sets and complex numbers to conic sections, vectors and Bayes' theorem.
The GAT is where the two exams part ways. In the same UPSC notice, English carries 200 marks and general knowledge 400. Within general knowledge, physics is about 25%, chemistry 15%, general science 10%, history 20%, geography 20% and current events 10%. The science is basic: Archimedes' principle, levers and pulleys, how a periscope or pressure cooker works, acids and bases. Your JEE reasoning helps here, but recall matters more.
For a closer look at the maths paper on its own, see our NDA maths plan alongside Class 12 boards.
Which NDA maths topics are not in JEE Main?
We compared the two official syllabi line by line. These NDA items do not appear in the JEE Main maths list:
Binary numbers and converting between decimal and binary
Linear inequations in two variables solved by graphs
Harmonic progressions (JEE lists only arithmetic and geometric)
Heights and distances, and properties of triangles
The equation of a plane, the angle between two planes, and the sphere
Histograms, pie charts, correlation and regression, and the binomial distribution
Most of these are short. Give them one slot a week until each has been done once, then fold them into mixed practice. If one is new to you, the Fermi Concept Library has a lesson for every concept in mathematics, so you can learn it properly before drilling questions.
The papers also mark differently. The UPSC notice deducts one third of a question's marks for each wrong answer and nothing for a blank, and bans calculators and log tables. NTA's public notice of 24 October 2026 says JEE Main has negative marking in both its multiple-choice and numerical-answer sections. Practise each in its own format.
What does a weekly split look like for a Class 12 student?
This plan assumes about 24 study blocks of 75 to 90 minutes a week outside school. Scale it to your own hours; keep the proportions.
From now to JEE Main session 1 in late January:
7 blocks of physics at JEE level
7 blocks of chemistry at JEE level
6 blocks of maths at JEE level, which count for NDA too
1 block of one NDA-only maths topic from the list above
2 blocks of English: one comprehension set, one grammar and vocabulary
1 block of history or geography, alternating weeks, plus ten minutes of news each day
From February to early April, board exams come first in exam weeks. Outside them, move one physics and one chemistry block to general knowledge, and on alternate Sundays sit a full NDA maths paper in 2½ hours without a calculator. UPSC posts past papers on its previous question papers page. When a paper goes wrong, the Fermi Problem Library has worked problems with a step-by-step solver that explains the reasoning, so you can see whether the slip was in the method or the arithmetic.
For other exam pairs, see how to prepare for JEE Main, BITSAT and a state CET together.
What should you do between JEE Main and NDA in April 2027?
Session 2 ends on 7 April and UPSC's calendar puts NDA (I) on 11 April, so you have three clear days. Use them for NDA only:
Day one: one full past maths paper under exam conditions, then review every wrong answer.
Day two: one full past GAT paper, then revise your general knowledge notes.
Day three: a one-page sheet of the NDA-only formulas, a light read of English rules, and an early night.
Parents weighing the defence route can read what to do when your child wants to join the NDA after Class 12. And when the 2027 notice goes up on 2 December, compare its syllabus pages with this list before you fix your timetable.
