Which two signs should be interchanged to make the given

Find the missing term in the given series:

What number should replace the question mark? 

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

First row: 14, 12, 108

What will come in the place of question mark?

Find the missing number.

Find the missing number.

Find the missing number by analysing the pattern followed by the numbers in each row.

Find the missing term in the following question:

Find the missing number.