I think, u should go for main exercises only, optional exercises are not important from the view of examination.

NCERT textbooks for class 10 Maths include optional exercises along with the main exercises. These optional exercises are designed to provide additional practice to the students and help them to reinforce their understanding of the concepts covered in the textbook. The optional exercises are not mandatory, but it is recommended that students attempt these exercises to improve their problem-solving skills and gain more confidence in the subject.



There are several benefits of doing optional exercises in NCERT class 10 Maths:

- Reinforcement of Concepts: The optional exercises contain additional problems that help students to reinforce their understanding of the concepts covered in the textbook.
- Practice: The optional exercises provide additional practice to the students and help them to sharpen their problem-solving skills.
- Examination Preparation: The optional exercises can be a great tool for exam preparation as they provide students with more practice questions that can be similar to the questions asked in the exam.
- Confidence Building: Attempting the optional exercises can help students to build more confidence in their ability to solve problems and perform well in the subject.



In conclusion, while the optional exercises are not mandatory, it is highly recommended that students attempt these exercises to reinforce their understanding of the concepts covered in the textbook, improve their problem-solving skills, and gain more confidence in the subject. By doing so, students will be better prepared for exams and have a deeper understanding of the subject.