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

3 22 ? 673 2696 8093 

Complete the following series.
12, 8, 14, 6, 16, ?

What will come in place of question mark(?) in the following number series?
119 , 131, 155, 191, 239, (?)

Direction : In the following question, select the correct answer from the given alternatives.
2, 8, 16, 128, ?

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

17 52 158 477 ? 4310 

Find the missing number?
2, 12, 30, ?, 90, 132

What will be come in place of question mark(?) in the following number series?
3, 22, ? , 673, 2696, 8093

Study the given pattern carefully and select the number that can replace the question mark (?) in it.
 First row: 17, 26, 60
 Second row: 8, 15, 31
 Third row: 11, 19, ?
 (NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. For example, 13 – Operations on 13 such as adding/deleting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)