Unit 18 · Variations
15 randomly selected questions from a bank of 60 · one attempt · 15 minutes on the clock.
Topics covered
- Ratio and proportion — antecedent/consequent, extremes/means, and the product-of-extremes rule
- Direct and inverse variation, with graphs, formulas, and real-life examples
- Third proportional, fourth proportional, and mean proportional in a continued proportion
- Theorems on proportion — invertendo, alternando, componendo, dividendo, and componendo-dividendo, with formal proofs
- Joint variation — combining direct and inverse relationships across multiple variables
- The k-Method for proving conditional equalities involving proportions
- Real-life problems based on variations — Hooke's law, the simple pendulum, Ohm's law, and more
Please fill in your name, class and roll/GR# to start the quiz.
Question 1 of 15
⏱ 15:00
Question Palette
Not answered
Answered
Current
Reference
Quiz Result
0
Total Qs
0
Correct
0
Wrong
0%
Percentage
0:00
Time Taken
Answer Review — Step by Step Solutions
Leaderboard
All attempts on this device, stored locally with a unique session ID.
| # | Name | Class | Roll/GR# | Correct | % | Status | Date |
|---|