Question

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series

55, 60, 58, 63, 61, 66, 64, ___.

1. 69
2. 68
3. 67
4. 66

Answer 1

Correct Answer - Option 1 : 69

Given

given series 55, 60, 58, 63, 61, 66, 64 ___.

Concept 

Series

Calculation

The numbers at first, third, fifth have a common difference of 3

Similarly the numbers at second, fourth, sixth also has a difference of 3

⇒ 60 + 3 = 63

⇒ 63 + 3 = 66

⇒ 66 + 3 = 69

∴ Ans = 69