UPSC NDA 1 2025 Unofficial Answer Key: The NDA 1 2025 Answer Key is a crucial resource for candidates who appeared for the National Defence Academy exam conducted by UPSC on April 13. It helps aspirants evaluate their performance by comparing their responses with the answers provided by the experts. The NDA answer key 2025 helps in calculating expected scores and assists in predicting chances of qualification. It allows the candidates to plan and refine their preparation strategies for the upcoming stages of the selection process like SSB Interview. In this article, we will provide the NDA 2025 Answer Key for both the Mathematics and General Ability Test (GAT) papers.
NDA 1 Answer Key 2025
The NDA 1 2025 Unofficial Answer Key is an essential tool for candidates to assess their performance and plan their next steps. While the official key is the final reference, the unofficial answer keys provide quick insights and relief for anxious aspirants. Stay connected with us for the latest updates on NDA1 2025
NDA 1 Mathematics Answer Key 2025
| NDA Mathematics Set D Answer Key | |||||||
| Ques No. | Answer | Ques No. | Answer | Ques No. | Answer | Ques No. | Answer |
| 1 | (c) Fifth | 31 | (b) AP with difference 6 | 61 | (c) 3sin⁻¹(2x/3) | 91 | (b) 39 |
| 2 | (a) 11 | 32 | (c) Three | 62 | (d) 9 / √(3 - x²) | 92 | (c) 164·41 cm |
| 3 | (d) 1 | 33 | (a) 6 | 63 | (d) 1 | 93 | (c) 164·5 cm |
| 4 | (b) 1 | 34 | (a) 1 | 64 | (a) I only | 94 | |
| 5 | (c) Two | 35 | (a) -3 | 65 | (d) 81 | 95 | (a) Variance (X) < Variance (Y) |
| 6 | (a) [-1 0; 0 -1] | 36 | (d) Neither I nor II | 66 | - | 96 | (a) Coefficient of variation of X is strictly more than coefficient of variation of Y |
| 7 | (a) -5I₃ | 37 | (c) 10001011 2 | 67 | (a) 0 | 97 | (c) 1/4 |
| 8 | (b) 2n | 38 | (b) Δ | 68 | - | 98 | (a) 135/1024 |
| 9 | (d) 42 | 39 | (d) All three | 69 | (d) 1 | 99 | (d) 100/231 |
| 10 | (b) Identity matrix | 40 | (b) -6 | 70 | (d) 6 - √3 - 2/2 | 100 | (d) 53/66 |
| 11 | (c) tanx⋅tan2x | 41 | (b) 0 | 71 | (b) 0 | 101 | (a) (0, ∞) |
| 12 | (c) 2sec4x | 42 | (a) -3/4 | 72 | (a) x=0 | 102 | (a) -tan(x/2) + C |
| 13 | (c) p/(p+2q) | 43 | (b) 1 | 73 | - | 103 | (b) 1 |
| 14 | (c) 3/4 | 44 | (a) 0 | 74 | - | 104 | (c) 1 |
| 15 | (c) 12/5 | 45 | (b) √2 | 75 | - | 105 | (d) (–∞, ∞) |
| 16 | (b) 30° | 46 | (c) Both I and II | 76 | (c) 2π | 106 | (d) 9 square units |
| 17 | (b) I and III only | 47 | (a) 60° | 77 | (b) 8 | 107 | (a) 1 |
| 18 | (c) tan⁻¹(1) | 48 | (a) 15√3 / 4 cm² | 78 | (c) 12 | 108 | (d) Neither I nor II |
| 19 | (b) π/2 | 49 | (b) (3 + √3) a / 2 | 79 | (c) 6 | 109 | (a) –1 |
| 20 | (a) 1 | 50 | (b) (3 - √3) b / 2 | 80 | (c) 4 | 110 | (b) 1/2 square unit |
| 21 | (a) 1 | 51 | (c) 23/45 | 81 | (a) mn - 1 = 0 | 111 | (b) 4y(x^2-4)/ (x^2+4) |
| 22 | (d) √66 square units | 52 | (a) 5/23 | 82 | (d) 4 - 2√3 | 112 | (d) –16y |
| 23 | (c) 3 | 53 | (a) 2.25 | 83 | (b) (1/2, √2 - 1) | 113 | (b) π/2 |
| 24 | (a) –37/41 | 54 | (b) 0.5 | 84 | (d) (3, 1) | 114 | (b) 9/2 square units |
| 25 | (a) 3x + 2y + z = 6 | 55 | (b) 3/8 | 85 | (d) 3x−4y+30=0 | 115 | (c) depends on both p and q |
| 26 | (d) 2 | 56 | (a) 1/4 | 86 | (b) x² + y² = 25 | 116 | (d) (y/x)^10 |
| 27 | (a) I only | 57 | (b) 5/12 | 87 | (c) (-1+1/√2, -1-1/√2) | 117 | (a) A straight line passing through (0, 0) |
| 28 | (b) 1 : 3 | 58 | (c) 1 - (11/5)(4/5)^6 | 88 | (a) (1, 2) | 118 | (a) 8 square units |
| 29 | (d) Unit vector | 59 | (b) 1000 | 89 | (d) 2√61 units | 119 | (d) Limit does not exist |
| 30 | (a) 1 | 60 | (c) 137.5 | 90 | (a) 4/5 | 120 | (a) I only |
NDA 1 GAT Answer Key 2025
To be updated soon
NDA 1 2025 Mathematics Answer Key PDF
Download the set-wise NDA answer key PDF for the exam conducted on April 13.
NDA 1 Mathematics Answer Key 2025 Set A
NDA 1 Mathematics Answer Key 2025 Set B
NDA 1 Mathematics Answer Key 2025 Set C
NDA 1 Mathematics Answer Key 2025 Set D
NDA 1 2025 GAT Answer Key PDF
Download the shift-wise NDA 1 2025 GAT answer key PDF for the exam conducted on April 13.
NDA 1 GAT Answer Key 2025 Set A
NDA 1 GAT Answer Key 2025 Set B
NDA 1 GAT Answer Key 2025 Set C
NDA 1 GAT Answer Key 2025 Set D
How to Use the NDA Unofficial Answer Key 2025?
Follow these steps to calculate your estimated score:
Step 1: Download the answer key pdf provided below.
Step 2: Compare your responses with the given answers.
Step 3: Use the official marking scheme to calculate your score.
Step 4: Calculate your total score based on correct and incorrect responses.
Benefits of Checking the NDA Unofficial Answer Key
Before the NDA official answer key is released by the Union Public Service Commission (UPSC), checking unofficial answer keys can provide several advantages to NDA aspirants.
- Helps students predict their scores and rank before the official results.
- Provides a detailed exam analysis and helps in identifying mistakes.
- Gives an early idea of expected cut-offs and eligibility for JEE Advanced 2025.
- If a student scores well, they can start preparing for JEE Advanced without waiting for the official results.
When Will the Official NDA Answer Key Be Released?
The official NDA 1 2025 answer key is expected within a week after the exam. Candidates can download it from the NTA’s official website- upsc.gov.in and challenge any discrepancies within the given deadline.
NDA 1 2025 Exam Highlights
The NDA Exam is being conducted by the Union Public Service Commission (UPSC) for admission to the Army, Navy, and Air Force wings of the National Defence Academy and Indian Naval Academy Course (INAC). The selection process includes a written examination followed by the SSB interview for shortlisted candidates. The NDA exam comprises two papers: Mathematics and General Ability Test (GAT), carrying a total of 900 marks. Successful candidates undergo rigorous training at the NDA in Khadakwasla, Pune, to serve as commissioned officers in the Indian Armed Forces.
| Exam Name |
National Defence Academy (NDA) 1 2025 |
| Conducting Body |
Union Public Service Commission (UPSC) |
| Exam Mode |
OMR-Based Test |
| Subjects Covered |
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| Total Marks |
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| Total Questions |
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| Exam Duration |
2.5 hours for each paper |
| Marking Scheme |
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| Selection Process |
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