Question : Directions: In the following question a series is given, with one number missing. Select the missing number from the given alternatives.
104, 52, 26, 13, 6.5, ?

Option 1: 3.5

Option 2: 3.75

Option 3: 4.25 

Option 4: 3.25

Question : Directions: In the following question, select the missing number of the given series.
55, 38, 21, 4, –13, ?

Option 1: –30

Option 2: –20

Option 3: –28

Option 4: –18

Question : Directions: In the following question, select the missing number of the given series.
35, 22, 43, 14, 51, ?

Option 1: 6

Option 2: 18

Option 3: 20

Option 4: 12

Question : Directions: In the following question, select the missing number of the given series.
43, 42, 39, 34, 27, ?

Option 1: 18

Option 2: 21

Option 3: 16

Option 4: 20

Question : Directions: In the following question, select the missing number of the given series.
44, 20, –4, ?, –52, –76

Option 1: –28

Option 2: –10

Option 3: –20

Option 4: 0