A series is given as 2, 6, 12, 20, ?. What comes next?
Q1. A series is given as 2, 6, 12, 20, ?. What comes next?
Answer: 30
Explanation: The difference between consecutive terms is increasing by 2, 4, 6, 8, ... . So, the next difference should be 10, hence 20 + 10 = 30.