Problems on Ages
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Quantitative Aptitude - Problems on Ages
Solve age comparison and change-over-time problems with age algebra and progressive changes.
1. Basic Approach
Let present ages be variables (e.g., age of A = a, B = b).
Write equations for each statement with time-shifts: "x years ago" → a-x, "y years hence" → b+y.
2. Common Formats
- Sum/difference now or in the future/past.
- Ratio forms involving time shifts.
3. Quick Tips
- Set up equations based on "years ago" or "hence" correctly.
- Use substitution to reduce variables when two equations are given.
4. Mistakes to Avoid
- Mixing past and future incorrectly.
- Ignoring ratio context when time changes apply.
5. Revision Checklist
- Practice translating English to age equations accurately.
- Use elimination or substitution strategies quickly.
Summary: Convert descriptions into simple time-shift equations, solve for variables swiftly, and verify with original statements.
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