Lesson 1 of 5 · Age relation puzzles
Linear equation
Age / Quant-Reasoning puzzles · for IPMAT Indore, IPMAT Rohtak and JIPMAT · asked in Rohtak 2019
The exam method
- Sufficiency: a statement is enough only if it gives a numeric equation; two pure differences never fix an age.
Worked examples
Example 1
A father is 4 times as old as his son; in 5 years, 3 times. Son s
4s + 5 = 3(s + 5), s = 10, father 40.
Example 2
Ages 3 : 5 now; four years ago the ratio was 1 : 2. 2(3k - 4) = 5k - 4, k = 4: B is 20.
Watch out
- Using 'older than' for 'times as old as'.
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