It looks like you've uploaded a mathematics practice sheet for Class 9 with various problems covering algebra, geometry, ratios, and other topics. Let me know if you'd like solutions or explanations for any specific questions from this sheet.

Here are a few questions I can guide you on directly:

1. Would you like me to solve the congruence problem in question 1 or 2?
2. Shall I explain the coefficient calculation in question 3?
3. Do you need help with the age problem in question 18?
4. Should I calculate the area or perimeter for any given shapes, like in questions 14, 15, or 19?
5. Are you looking for an explanation about the logic or reasoning used in any of these questions?

Tip: Always start by breaking down the question into smaller steps to simplify solving!