The Tamil Nadu Class 10 Half Yearly Mathematics Question Paper and Answer Key for 2025-26 (including the Chennai district common papers) is part of the state-wide common examination cycle held in December 2025 .

According to the Careers360 page you provided, these resources are being updated as the exams conclude. Since the Half Yearly exams are generally conducted just before the winter holidays, the official and unofficial answer keys are typically uploaded within 24 to 48 hours after the exam is held.

Highlights of the Class 10 Maths Half Yearly Exam:

• Total Marks: 100.

• Duration: 3 Hours.

• Question Structure: * Part I: 14 One-mark questions (MCQs).

  • Part II: 10 Two-mark questions.

  • Part III: 10 Five-mark questions.

  • Part IV: 2 Eight-mark questions (usually involving Geometry and Graphs).

• Syllabus: Covers approximately 80-90% of the Class 10 Mathematics textbook, making it a crucial "pre-board" assessment.

How to access the Chennai District Key:

1. Visit the https://school.careers360.com/boards/dge-tamil-nadu/tamil-nadu-class-10-half-yearly-mathematics-question-paper-2025-26

2. Scroll down to the "Download Question Paper/Answer Key" table.

3. Look for the link specific to 2025-26 ; if it is marked as "Available Soon," it means the PDF is currently being processed or the specific district set is being verified.