What should come in place of X in the given series?
9 13 21 33 49 X
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 69.
Given series: 9 13 21 33 49 X
9 + 4 = 13, 13 + 8 = 21, 21 + 12 = 33, 33 +16 = 49, + 20 = 69