1. You have a test in 20 minutes worth 80 marks covering all Grade 10 math chapters. 2. Since the test covers all chapters, focus on key topics: algebra, geometry, trigonometry, statistics, and functions. 3. For algebra, review solving equations, inequalities, and quadratic functions. 4. For geometry, recall properties of shapes, theorems about angles, and area/volume formulas. 5. For trigonometry, practice sine, cosine, tangent ratios and solving right triangles. 6. For statistics, understand mean, median, mode, and interpreting graphs. 7. For functions, review linear, quadratic, and exponential functions and their graphs. 8. Use formulas like quadratic formula $$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$ and Pythagoras theorem $$a^2+b^2=c^2$$. 9. Manage your time by quickly solving easier problems first, then tackle harder ones. 10. Stay calm, read each question carefully, and check your work if time permits. Good luck!