SSC CGL 5 August, 2017 Shift 1 Question 9(Reasoning) with Solution.

In the following question, select the missing number from the given series.
2, 5, 12, 27, ?
Options:
1. 53
2. 56
3. 12
4. 58
Answer: 58

5 - 2 = 3
12 - 5 = 7(7-3)
27 - 12 = 15(15-7)
58 - 27 = 31(31-15)