Complete the series:
20, 33, 48, 65, 84, ______
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 105
The differences between consecutive terms rise by 2 each time:
\(33-20=13\), \(48-33=15\), \(65-48=17\), \(84-65=19\)
The next difference is 21, so the next term is \(84+21=105\)