Which number will replace the question mark (?) in the following series?
11, 19, ?, 49, 79, 128
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 30.
Logic: The previous number is added to the given number to get the next number
11 + 8 = 19, 19 + 11 = 30, 30 + 19 = 49, 49 + 30 = 79, 79 + 49 = 128