Complete the series :

7 , 3 , -1 , -5 , ---

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 1, 2, 3, 14, 5, 34, 7,_____,_____

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 17, 13, 11, 7, 5, ___

Select the correct option that will fill in the blank and complete the series. 2, 5, 7, 12, ?, 31, 50

Select the correct option that will complete the series 7.5, 4.7, 1.9, -0.9, ____

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 5,7,? , 10.5, 12.9, 15.3, 17.7

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 1, 3, 7, 13, 21, ?