Which one of the following is used in organic

Find the missing number.

What number should replace the question mark? 

Find the missing term in the given series:

Choose the correct alternative that will complete the given number series. 2, 9, 28, 65, ?, 217

A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.

18, 19, 27, 36, ___, 225

Select the number that can replace the question mark (?) in the following series. 

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

First row: 4, 6, 18

Find the missing number.

Find the missing number from the given responses.