HomeTestsSearchRankProfile
mediumMCQStaff Selection Commission2026General Intelligence & Reasoning
1 mark

Select the correct option that will fill in the blank and complete the series.
43, 55, 79, 115, ______

  1. A
    163
  2. B
    127
  3. C
    172
  4. D
    139

Solution & Step-by-step Explanation

Let's calculate the difference between consecutive terms:
55−43=12

79−55=24

115−79=36

The differences are consecutive multiples of 12 (12×1,12×2,12×3). Following this logic, the next difference must be:

12×4=48
Now, add this difference to the last term to find the missing value:

Missing Term=115+48=163

Practice this question

Try it yourself before checking the explanation above.

Select the correct option that will fill in the blank and complete the series.
43, 55, 79, 115, ______
A
163
B
127
C
172
D
139

Share This Question

Related Questions

Ready for a Full Test?

Practice with timed mock tests and track your performance across General Intelligence & Reasoning.

Discussion