Go on dividing by 6, 5, 4, 3, 2, 1 respectively to obtain the next number. Clearly, 92 is wrong.

Correct Option: C

Go on dividing by 6, 5, 4, 3, 2, 1 respectively to obtain the next number. Clearly, 92 is wrong.

Go on multiplying the number by 2 and adding 1 to it to get the next number.

Correct Option: C

Go on multiplying the number by 2 and adding 1 to it to get the next number. So, 27 is wrong.

Let the given number be A, B, C, D, E, F, G. Then A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required number .

Correct Option: D

Let the given number be A, B, C, D, E, F, G. Then A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required number . Clearly, 228 is wrong.

Go on subtracting prime numbers 19, 17, 13, 11, 7, 5 from the number to get the next number.

Correct Option: C

Go on subtracting prime numbers 19, 17, 13, 11, 7, 5 from the number to get the next number. So, 88 is wrong.

The pattern is
1² ,
1² + 2²,
1² + 2² + 3²,
1² + 2² + 3² + 4²,
1² + 2² + 3² + 4² + 5²,
1² + 2² + 3² + 4² + 5² + 6² .

Correct Option: B

The pattern is
1² ,
1² + 2²,
1² + 2² + 3²,
1² + 2² + 3² + 4²,
1² + 2² + 3² + 4² + 5²,
1² + 2² + 3² + 4² + 5² + 6² .
But 50 is not of this pattern.