Exams › SSC CGL (Prelims) › General
In the following number pairs, the second number is derived from the first by applying a consistent mathematical rule. Identify the pair that does NOT follow the same rule as the others.
- 10 : 33
- 2 : 9
- 8 : 29
- 6 : 21
Correct answer: 6 : 21
Solution
The pattern in most pairs is: second number = first number x 3 + 3. Checking: 10x3+3=33 (yes), 2x3+3=9 (yes), 6x3+3=21 (yes), but 8x3+3=27 not 29. Therefore 8:29 is the pair that does not follow the rule.
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