Comparative Ranking
Comparative Ranking problems involve arranging persons or items based on comparison clues (e.g., 'A is taller than B', 'C is heavier than D'). These problems test your ability to chain comparisons together to determine the complete order.
What You'll Learn
Introduction to Comparative Ranking
Comparative Ranking problems involve arranging persons or items based on comparison clues (e.g., 'A is taller than B', 'C is heavier than D'). These problems test your ability to chain comparisons together to determine the complete order.
Prerequisites
How to Solve Comparative Ranking Problems
Step 1: List all persons or items mentioned in the problem
Step 2: Write all comparison statements as inequalities (e.g., A > B, C < D)
Step 3: Identify the strongest relationships (direct comparisons)
Step 4: Use the transitive property to chain comparisons together
Step 5: Build a complete ordering from highest to lowest (or vice versa)
Step 6: Identify positions (1st, 2nd, 3rd, etc.) in the order
Step 7: Answer the specific question (who is tallest, shortest, 3rd from top, etc.)
Step 8: Verify that all given comparisons are satisfied in your order
Example Problem
Example: Among five friends, A is taller than B. C is shorter than B. D is taller than A. E is shorter than C. Who is the tallest? Solution: Step 1: Persons: A, B, C, D, E Step 2: Inequalities: A > B, C < B, D > A, E < C Step 3: Rewrite as: D > A > B > C > E Step 4: Complete order: D (tallest), A, B, C, E (shortest) Step 5: Tallest is D Answer: D is the tallest
Pro Tips & Tricks
- Convert all statements to the same direction (e.g., all using 'greater than')
- Use the transitive property: If A > B and B > C, then A > C
- Draw a vertical number line with highest at top and lowest at bottom
- Look for the person who is greater than everyone else (top rank)
- Look for the person who is less than everyone else (bottom rank)
- If statements seem contradictory, double-check your chaining
Shortcut Methods to Solve Faster
Common Mistakes to Avoid
Practice Worksheets
Practice makes perfect! Work through these worksheets to master Comparative Ranking. Each worksheet contains 20 questions with detailed explanations. Start from Worksheet 1 and progress through increasing difficulty levels.
Exam Importance
Comparative Ranking is an important topic for various competitive exams. Here's how frequently it appears:
Ready to Master Comparative Ranking?
Start with Worksheet 1 and work your way up to expert level! Each worksheet includes: