Proper time of sowing hybrid maize

Find the missing number.

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

First row: 4, 6, 18

In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Study the given matric carefully and select the number from among the given options that can replace the question mark (?) in it.

In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Find the missing numbers.

Select the number from among the given options that can replace the question mark (?) in the following table.

M/14 : O/12 : : U/6 : ?

Find the missing number.