Question

Select the number that will replace the question mark (?) in the following series.

25, ?, 43, 67, 115, 211

1. 33
2. 31
3. 30
4. 37

Answer 1

Correct Answer - Option 2 : 31

The logic is as follows:

25 + 6 = 31

31 + 12 = 43

43 + 24 = 67

67 + 48 = 115

115 + 96 = 211

Hence, the missing number is 31.