The numbers of the sequence are the consecutive prime numbers starting from 3.
Since, 9 is not a prime number, it should be replaced by 11.

Correct Option: C

The numbers of the sequence are the consecutive prime numbers starting from 3.
Since, 9 is not a prime number, it should be replaced by 11.
Hence ,the wrong number in the sequence is 9 .

The given sequence is based on the following pattern :

Correct Option: A

The given sequence is based on the following pattern :

Hence , the next number of the sequence is 122.

The pattern of the sequence is :
1 + 2³ = 1 + 8 = 9
1 + 3³ = 1 + 27 = 28
1 + 4³ = 1 + 64 = 65
1 + 5³ = 1 + 125 = 126
........... and so on.

Correct Option: D

The pattern of the sequence is :
1 + 2³ = 1 + 8 = 9
1 + 3³ = 1 + 27 = 28
1 + 4³ = 1 + 64 = 65
1 + 5³ = 1 + 125 = 126
1 + 6³ = 1 + 216 = ?
∴ ? = 217

The pattern of the sequence is :
6² = 36
9² = 81
12² = 144
15² = 225
18² = 324 ≠ 256
........... and so on.

Correct Option: D

The pattern of the sequence is :
6² = 36
9² = 81
12² = 144
15² = 225
18² = 324 ≠ 256
21² = 441
From above , It is clear that the wrong number of the sequence is 256 .

The pattern of the sequence is :
First term = 2
Second term = First term + 1 = 2 + 1 = 3
Third term = Second term × 2 = 3 × 2 = 6
Fourth term = Third term + 1 = 6 + 1 = 7
Fifth term = Fourth term × 2 = 7 × 2 = 14
Sixth term = Fifth term + 1 = 14 + 1 = ?

Correct Option: A

The pattern of the sequence is :
First term = 2
Second term = First term + 1 = 2 + 1 = 3
Third term = Second term × 2 = 3 × 2 = 6
Fourth term = Third term + 1 = 6 + 1 = 7
Fifth term = Fourth term × 2 = 7 × 2 = 14
Sixth term = Fifth term + 1 = 14 + 1 = ?
∴ ? = 15

Hence , The next term of the sequence is 15 .