Third generation pesticides

Find the missing term in the following question:

Find the missing number.

Choose the correct alternative from the given ones that will complete the series.

3.5 , ?,  8.3, 10.7, 13.1 , 15.5

Find the missing term in the following series:

43 44 ? 69 185

Find the missing number.

Select the missing number from the given responses.

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: 14, 17, 40