Data Sufficiency

Sn=S(n-2)+11, is 633 a term of the sequence?

1). S1=39
2). S2=43

OA-A

Sn=S(n-2)+11, is 633 a term of the sequence?

1). S1=39
Sn=S(n-2)+11 here all the terms would be the seed value is startig value + some multiple of 11

633 = 39 + 11x

11x= 633 - 39, x= 594/11 =54

Hence it is a term

2). S2=43

similarly 633 =43 +11x

i.e 590/11 produces a remainder hence this is not a term

ans A

Adding to Samir's answer:

> 2). S2=43
>similarly 633 =43 +11x
> i.e 590/11 produces a remainder hence this is not a term

For 2, 633 could be part of the S1, S3, S5... sequence, and since S1 is not specified, 2 is insufficient.