Find the missing number in the series: 1, 2, 4, 7, 11, ?, 18
Q1. Find the missing number in the series: 1, 2, 4, 7, 11, ?, 18
Answer: 16
Explanation: The pattern is formed by adding 1, 2, 3, 4, 5, ... to the previous term, so the missing number is 11 + 5 = 16.