On May 23, 2023, who assumed the position of Chairperson

60      61       57      66       ?       75       39

What should come in place of (?) question mark in the following number series.

4, 9, 19, 34, 54, ?

What will come in place of the question mark (?) in the following series?

13, 27, 57, 119, ?, 487

99, 101, 107, 131, 251, ?

289      169        121         ?        25         9

11           22.5        47           102         236         ?

1500     150      30      ?      3.6       1.8

1, 26, 75, 156, 277, ?

16, 8, 8, 12, ?, 60

21, 37, 73, 137, ?, 381