Exams › SSC CGL (Prelims) › General
In each number pair the second number is derived from the first by a consistent operation. Find the pair that does NOT follow the common rule. (Operations on whole numbers only; no digit-splitting.)
- 24 : 169
- 12 : 49
- 48 : 625
- 36 : 365
Correct answer: 36 : 365
Solution
Rule: (n/2 + 1)^2. For 24: (12+1)^2 = 169. For 12: (6+1)^2 = 49. For 48: (24+1)^2 = 625. For 36: (18+1)^2 = 361, not 365. So 36:365 is the odd one out.
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