Which of the following numbers will replace the question mark (?) in the given series?
4, 7, 12, 19, 28, 39, 52, 67,?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 84.
4 + 3 = 7; 7 + 5 = 12; 12 + 7 = 19; 19 + 9 = 28; 28 + 11 = 39; 39 + 13 = 52; 52 + 15 = 67; 67 + 17 = 84