It looks like you've uploaded a worksheet with practice questions in mathematics for Class VI. Let's go through the first few questions together:

1. Write in Indian system of numeration by putting proper commas:

   • 23489881
   • 23348766
   • 1009756757

2. Write in International system of numeration by putting proper commas:

   • 23467581
   • 20988766
   • 1109876757

3. Name the type of angles:

   • 189°, 356°, 34°, 199°, 90°, 167°, 128°, 180°

4. Draw angles of:

   • 135°, 76°, 67°, 112°, 158°

5. Define:

   • (a) Prime number
   • (b) Composite number
   • (c) Acute angled triangle
   • (d) Right angled triangle
   • (e) Right isosceles triangle
   • (f) Obtuse isosceles triangle
   • (g) Equilateral triangle

Would you like to work through these questions one by one, or should I solve them all? Feel free to specify!

Here are some additional questions to expand on the topics:

1. What are the key differences between the Indian and International system of numeration?
2. Can an angle be both acute and obtuse? Why or why not?
3. Explain why a triangle cannot have two right angles.
4. What is the sum of the interior angles of a triangle? Does this change with different types of triangles?
5. How would you classify a triangle with sides 5 cm, 12 cm, and 13 cm?

Tip: When working with angles, always remember that the sum of angles in a triangle is 180°.