Age Grid
Age Grid problems present age information in a grid or matrix format, often combining multiple persons with multiple attributes (age, profession, city, etc.). These problems test systematic data organization skills.
What You'll Learn
Introduction to Age Grid
Age Grid problems present age information in a grid or matrix format, often combining multiple persons with multiple attributes (age, profession, city, etc.). These problems test systematic data organization skills.
Prerequisites
How to Solve Age Grid Problems
Step 1: Create a grid with persons as rows and attributes as columns
Step 2: Fill in all directly given information in the grid
Step 3: Use relationship clues to mark possibilities
Step 4: Apply elimination based on constraints (e.g., each age unique)
Step 5: Use 'if-then' conditions to deduce more information
Step 6: Complete the grid systematically
Step 7: Answer questions based on the completed grid
Example Problem
Example: A, B, C are aged 10, 15, 20 (not in order). A is older than B. C is not the youngest. Find each age. Solution: Create grid with ages 10,15,20. A > B, so A cannot be 10, B cannot be 20. C not youngest, so C cannot be 10. Deduction: C must be 15 or 20; B must be 10 or 15; A must be 15 or 20. If A=20, then B=10 (since A>B), then C=15 (remaining). This works. Answer: A=20, B=10, C=15
Pro Tips & Tricks
- Create a grid with persons on one axis and ages on the other
- Use '✓' for possible assignments, '✗' for impossible
- Each person has exactly one age, each age assigned to exactly one person
- Start with the most restrictive clue
- Use transitive relationships to chain deductions
- Update the grid after each deduction
Shortcut Methods to Solve Faster
Common Mistakes to Avoid
Practice Worksheets
Practice makes perfect! Work through these worksheets to master Age Grid. Each worksheet contains 20 questions with detailed explanations. Start from Worksheet 1 and progress through increasing difficulty levels.
Exam Importance
Age Grid is an important topic for various competitive exams. Here's how frequently it appears:
Ready to Master Age Grid?
Start with Worksheet 1 and work your way up to expert level! Each worksheet includes: