Question

Series - I & II have same logic
Series - I:3, 19, 103, 439, 1381, 2887
What will be come in place of b

Series - II : 5, (a), (b), (c), (d), (e)

1)139
2)163
3)161
4)157
​

Answer 1

Answer:

Step-by-step explanation:

19=3x6+1^3

103=19x5+2^3

439=103x4+3^3.....

By same logic

5x6+1^3=31

31x5+2^3=163 and thats your answer