Series pattern
+ 13, + 26, + 39, + 52, + 65

Correct Option: A

Series pattern
+ 13, + 26, + 39, + 52, + 65
∴ Missing term = 132 + 65 = 197

Series pattern
12 x 1 + 3 x 1 = 15
15 x 2 + 3 x 2 = 36
36 x 3 + 3 x 3 = 117
Should come in place of ?
117 x 4 + 3 x 4 = 480

Correct Option: C

Series pattern
12 x 1 + 3 x 1 = 15
15 x 2 + 3 x 2 = 36
36 x 3 + 3 x 3 = 117
Should come in place of ?
117 x 4 + 3 x 4 = 480
480 x 5 + 3 x 5 = 2415
2415 x 6 + 3 x 6 =14508

Series pattern
Previous number / 5

Correct Option: A

Series pattern
Previous number/5
∴ Missing term = 244/5 = 48.8

On the basis of above given series ,
Clearly, repetition takes place for each set of four terms.
Hence, 507th term will be 2507, when divided by 4, gives 3 as remainder and 3rd term is 2.

Correct Option: D

On the basis of above given series ,
Clearly, repetition takes place for each set of four terms.
Hence, 507th term will be 2507, when divided by 4, gives 3 as remainder and 3rd term is 2. Thus , option D is correct answer.

1², 3², 5², 7², 9², 11²

Correct Option: A

Series pattern
1², 3², 5², 7², 9², 11²
So missing term = 11² = 121