The following questions below the series I and series II shows the different logical patterns
Series I: 315, 379, 595, 1107, 2100, 3835.
Series II: a, (a + b), 521, 665, 834, 1030
(Wrong number in series I)/7 is considered as the first number in series II. Find the value of b
1
150
2
80
3
100
4
120
5
140