Question

1, 2, 6, 7, 21, 22, 66, 67, ?
A.70
B.134
C.201
D.301

Answer 1

$\huge\Black {Answer}$

C. 201

The pattern is + 1, x 3, + 1, x 3, + 1, x 3, + 1,.....
So, missing term = 67 x 3 = 201.