Eldest-Youngest
Eldest-Youngest problems involve determining the oldest and youngest persons in a family or group based on given age relationships. These problems test your ability to compare ages and establish ordering.
What You'll Learn
Introduction to Eldest-Youngest
Eldest-Youngest problems involve determining the oldest and youngest persons in a family or group based on given age relationships. These problems test your ability to compare ages and establish ordering.
Prerequisites
How to Solve Eldest-Youngest Problems
Step 1: List all persons mentioned in the problem
Step 2: Write all age relationships as inequalities (>, <, =)
Step 3: Create an age order chain from youngest to oldest
Step 4: Identify the eldest (maximum age) and youngest (minimum age)
Step 5: If ages are given numerically, calculate exact ages
Step 6: Answer which person is eldest or youngest
Example Problem
Example: A is older than B. C is younger than B. D is older than A. Who is the eldest? Solution: Step 1: Write inequalities: A > B, C < B, D > A Step 2: From D > A and A > B, we get D > A > B Step 3: From B > C, we get D > A > B > C Step 4: D is the eldest, C is the youngest Answer: D is the eldest
Pro Tips & Tricks
- Use > and < symbols to create a visual chain
- Transitive property: If A > B and B > C, then A > C
- Draw a number line to visualize age order
- If ages are equal, note the equality condition
- Look for the person who is greater than everyone else
- Look for the person who is less than everyone else
Shortcut Methods to Solve Faster
Common Mistakes to Avoid
Practice Worksheets
Practice makes perfect! Work through these worksheets to master Eldest-Youngest. Each worksheet contains 20 questions with detailed explanations. Start from Worksheet 1 and progress through increasing difficulty levels.
Exam Importance
Eldest-Youngest is an important topic for various competitive exams. Here's how frequently it appears:
Ready to Master Eldest-Youngest?
Start with Worksheet 1 and work your way up to expert level! Each worksheet includes: