Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
6, 11, 21, 41, 81, ?

Option 1: 241

Option 2: 151

Option 3: 161

Option 4: 240

Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
21, 23, 20, 22, 19, 21, ?

Option 1: 17

Option 2: 18

Option 3: 23

Option 4: 22

Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
1, 3, 17, 55, ?, 179, 265, 375

Option 1: 169

Option 2: 157

Option 3: 91

Option 4: 105

Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
18, 36, 25, 50, 39, ?

Option 1: 72

Option 2: 76

Option 3: 74

Option 4: 78

Question : Directions: Select the letter cluster from among the given options that can replace the question mark (?) in the following series.
GRAM, EPYK, CNWI, ?

Option 1: AMVH

Option 2: AMUG

Option 3: ALUG

Option 4: ALVG