Exams › SSC CGL (Prelims) › General
In each of the following pairs, the second number is derived from the first by a consistent mathematical operation. One pair does NOT follow the same rule. Identify it.
- 5 : 128
- 3 : 30
- 7 : 352
- 1 : 4
Correct answer: 7 : 352
Solution
The rule is n^3 + 3. For n=1: 1+3=4 (correct). For n=3: 27+3=30 (correct). For n=5: 125+3=128 (correct). For n=7: 343+3=346, not 352. So 7:352 is the odd one out.
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