Question

What is the missing number?
3,16,42,81,133,?. pls explain me with logic

Answer 1

Thank you for asking the question!
In these questions the correct sequence is very important. If sequence is not followed properly then the answer will be incorrect. the hint for solving such question lies in the previous sequence. 
In this problem the sequence is based on the increasing order of the multiples of 13. And then the multiples of 13 are re added. 3+13= 16 then 16+13*2=42, 42+13*3=81, 81+13*4=133 similarly 133+13*5= 198
Hence 198 is the final answer .
Hope it helps.

Answer 2

(13×0)+3 = 3

(13 x 1)+3 =16

(13 x 2)+16= 42

(13 x 3)+ 42= 81

(13 x 4)+ 81 = 133

(13 x 5)+ 133 = 198