Civil Services Examination · Question 36
What is X in the sequence 24, X, 12, 18, 36, 90?
Show answer & explanation
Answer: (B) 12
Explanation
Multipliers 0.5, 1, 1.5, 2, 2.5: 24 × 0.5 = 12 = X, then 12, 18, 36, 90. (Answer as per the official UPSC answer key.)