Bihar Board 12th Maths Unofficial Answer Key 2026: As scheduled, the Bihar School Examination Board (BSEB) held the Class 12 Mathematics Examination 2026 today, February 3, 2026, from 9:30 AM to 12:45 PM. BSEB Class 12 Maths exam 2026 follows a 100-mark assessment structure, split between a 70-mark theory paper and a 30-mark practical exam. Students who appeared for the Bihar Board Class 12 Maths Theory Examination 2026 can check the Bihar Board 2026 Class 12th Maths Unofficial Answer Key available here.
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Students can check the BSEB 2026 Class 12th Maths Unofficial Answer Key available in the table below.
| Bihar Board 2026 Class 12th Maths Questions (SET A) |
Bihar Board 2026 Class 12th Maths Answers (SET A) |
| Question 1 |
D: -π/6 |
| Question 2 |
B: tan inverse 3/4 |
| Question 3 |
C: Zero |
| Question 4 |
B: 4/5 |
| Question 5 |
C: 3π/4 |
| Question 6: |
C: 5π/6 |
| Question 7: |
C: 3π/4 |
| Question 8: |
A: √1-x2/x |
| Question 9: |
C: π/4 |
| Question 10: |
C: 2tan inverse x |
| Question 11: |
C: Zero |
| Question 12: |
B: Zero |
| Question 13: |
A: +-2 |
| Question 14: |
B: Zero |
| Question 15: |
B: P=(A U B) |
| Question 16: |
A: P(A).P(B).P(C) |
| Question 17: |
A: 4/9 |
| Question 18: |
B: 7/10 |
| Question 19: |
D: n/x |
| Question 20: |
C: -4 Sin 2x |
| Question 21: |
A: e^x-a |
| Question 22: |
B: 2x+a/√x^2+ax+1 |
| Question 23: |
A: 2x Cosx^2 |
| Question 24: |
C |
| Question 25: |
B: Zero |
| Question 26: |
B: 2/1+x^2 |
| Question 27: |
B |
| Question 28: |
B: Zero |
| Question 29: |
B |
| Question 30: |
C: 10x-y=8 |
| Question 31: |
B: Cos X/2y-1 |
| Question 32: |
A |
| Question 33: |
C |
| Question 34: |
A |
| Question 35: |
A |
| Question 36: |
B |
| Question 37: |
A |
| Question 38: |
A |
| Question 39: |
C |
| Question 40: |
B |
| Question 41: |
B |
| Question 42: |
C |
| Question 43: |
C |
| Question 44: |
C |
| Question 45: |
A |
| Question 46: |
B |
| Question 47: |
A |
| Question 48: |
A |
| Question 49: |
B |
| Question 50: |
C |
| Question 51: |
D |
| Question 52: |
A |
| Question 53: |
D |
| Question 54: |
A |
| Question 55: |
C |
| Question 56: |
A |
| Question 57: |
B |
| Question 58: |
D |
| Question 59: |
D |
| Question 60: |
B |
| Question 61: |
A |
| Question 62: |
A |
| Question 63: |
C |
| Question 64: |
C |
| Question 65: |
A |
| Question 66: |
B |
| Question 67: |
A |
| Question 68: |
A |
| Question 69: |
A |
| Question 70: |
C |
| Question 71: |
B |
| Question 72: |
B |
| Question 73: |
A |
| Question 74: |
A |
| Question 75: |
A |
| Question 76: |
A |
| Question 77: |
A |
| Question 78: |
B |
| Question 79: |
B |
| Question 80: |
A |
| Question 81: |
D |
| Question 82: |
B |
| Question 83: |
C |
| Question 84: |
A |
| Question 85: |
A |
| Question 86: |
B |
| Question 87: |
C |
| Question 88: |
C |
| Question 89: |
B |
| Question 90: |
A |
| Question 91: |
A |
| Question 92: |
B |
| Question 93: |
C |
| Question 94: |
A |
| Question 95: |
B |
| Question 96: |
B |
| Question 97: |
B |
| Question 98: |
B |
| Question 99: |
A |
| Question 100: |
D |
Bihar Board 2026 12th Maths: Question Paper Analysis
Students can access the Bihar Board 2026 Class 12th Maths Exam Analysis from the table below.
| Particulars |
Details |
| Bihar Board 2026 Class 12th Maths Overall Difficulty Level |
Moderate |
| Was the Paper Lengthy? |
Yes |
| Number of Good Attempts |
to be updated |
| Important Topics Asked |
to be updated |
The Bihar Board 2026 Class 12th Maths Unofficial Answer Key is prepared by the subject-experts. Students are advised to use the above unofficial answer key to evaluate their performances. Unofficial answer keys are typically released by private coaching institutes and subject experts within a few hours of the exam's conclusion to help students estimate their scores.
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