Which number will replace the question mark (?) in the following series?
4, 13, 9, 17, 19, 19, 39, 23, ?, 25
1
79
2
87
3
97
4
78
5
Question Not Attempted
Which number will replace the question mark (?) in the following series?
4, 13, 9, 17, 19, 19, 39, 23, ?, 25