Select the number from among the given options that can replace the question mark (?) in the following series.
4, 7, 11, 17, 27, 45,?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1. i.e. 79.
Given series: 4, 7, 11, 17, 27, 45,?
The series follows this pattern:
4 × 2 - 1 = 8 - 1 = 7
7 × 2 - 3 = 14 - 3 = 11
11 × 2 - 5 = 22 - 5 = 17
17 × 2 - 7 = 34 - 7 = 27
27 × 2 - 9 = 54 - 9 = 45
45 × 2 - 11 = 90 - 11 = 79
So, the next term in the series is 79.