Number Series Questions

The missing number in the given series is:

15 (105) 14 , 13 (?) 12

In the following question, select the missing number from the given series.

1161, 1164, 1168, 1173, 1179, ?

In the following question, select the missing number from the given series.

9, 16, 13, 12, 17, 8, ?, ?

In the following question, select the missing number from the given series.

11, 13, 17, 19, 23, ?

In the following question, select the missing number from the given series.

11, 13, 16, 18, 21, ?

In the following question, select the missing number from the given series.

8, 16, 43, 107, 232, ?

Find the missing number (?) in the series

1, 1, 4, 8, 9, ?, 16, 6,...

Which number will fit in '?' place in the following series?

2, ?, 12, 20, 30, 42