Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · AgeEasy · 45s
The average age of 4 children born at intervals of 2 years each is 8 years. Find the age of the youngest child.
TopicAge
Question Typemultiple choice
DifficultyEasy
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Let youngest = x ⇒ ages = x, x+2, x+4, x+6 ⇒ avg=(4x+12)/4=8 ⇒ x=4.
Final Answer: Option A - 4 years