The UPSC NDA 2 Mathematics Unofficial Answer Key 2025 has been released on the same day the exam was conducted. The UPSC NDA 2 exam 2025 was held on September 14, 2025. With the help of the NDA unofficial answer key 2025, you can match your responses, calculate the probable marks, and get an idea about your chances of qualifying for the next stage, which is the SSB interview.
While the official NDA Mathematics answer key 2025 is uploaded on the UPSC website only after the full recruitment process is complete, these unofficial answer keys will act as quick and reliable sources for early score checking. You can easily download the NDA 2 Maths answer key PDF and question papers from here. The official UPSC NDA 2 Maths answer key 2025 will finally be released along with the declaration of the results.
UPSC NDA 2 Mathematics Unofficial Answer Key 2025 PDF Download
The UPSC NDA 2 Mathematics Unofficial Answer Key 2025 is provided below:
Questions Asked | Answers |
|---|---|
Let y=x! and z= (2x)!. If (z/y) = 120, then what is the value of (3x)!? | d) More than 5 |
How many terms of the series 1+3+5+7+... amount to a sum equal to 12345678987654321 | a) 111111111 |
How many terms are identical in the two APs 19, 21, 23,... up to 110 terms and 19, 22, 25, 28, ... up to 75 terms | c) 37 |
In a class of 45 students, 34 like to play cricket and 26 like to play football. Further, each student likes to play at least one of the two games. How many students like to play exactly one game? | d) 15 |
The system of equations 2x-3y-5=0, 15y-10x+50=0 | c) is inconsistent |
How many 4-digit numbers that are divisible by 4 can be formed using the digits 1,2,3, and 4. (Repetition of digits not allowed) | b) 6 |
How to Calculate Marks using UPSC NDA 2 Mathematics Unofficial Answer Key 2025?
If you want to know your marks in the UPSC NDA 2 Mathematics paper 2025 using the unofficial answer key, it is very easy. The Mathematics paper has 120 questions in total, and the paper carries 300 marks. The marking scheme is also simple:
- For every correct answer, you get +2.5 marks.
- For every wrong answer, –0.83 marks are deducted (negative marking).
- For every unattempted question, you get 0 marks.
To calculate your NDA 2 Maths score from the unofficial answer key, just compare your answers with the key. Count how many you got correct and how many you got wrong. After that, use this formula:
Total Marks = (Number of Correct Answers × 2.5) – (Number of Wrong Answers × 0.83) |
|---|
This will give you your estimated score for the UPSC NDA 2 Mathematics paper 2025. Also, there is no negative marking for questions you did not attempt. This is only an estimated score based on the unofficial answer key and not the final result.
UPSC NDA 2 Mathematics Answer Key Challenge 2025
Once the official UPSC NDA 2 maths answer key is released on the UPSC website, students who think there is any mistake or have doubts about a particular answer can raise objections. The objection window is open only for a short time, usually about 7 days after the answer key is uploaded.
To submit a challenge, candidates must use the UPSC Online Question Paper Representation Portal (QPRep). They need to log in with their details, select the question they want to object to, and provide a valid reason or proof for why the given answer is wrong.
UPSC will then carefully check all the objections. If a challenge is found correct, the NDA 2 Mathematics Answer Key 2025 will be revised. The UPSC NDA 2 Result 2025 is finally prepared on the basis of this updated and final answer key.
To get more updates on UPSC NDA 2 Mathematics Unofficial Answer Key 2025, you can reach out to us by dialling our toll-free number 1800-572-9877 or write to us at our QnA Zone . Fill out CollegeDekho’s Common Application Form to get guidance from our team of college counsellors!
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