Question

In the following number series, a wrong number is given. Find out that wrong number.

 2 11 38 197 1172 8227 65806

(a) 11 (b) 38 (c) 197 (d) 1172 (e) 8227

Answer 1

(d) The series is based on the following pattern:
2 × 3 + 5 = 11
11 × 4 – 6 = 38
38 × 5 + 7 = 197
197 × 6 – 8 = 1174 ; not 1172
1174 × 7 + 9 = 8227
8227 × 8 – 10 = 65806
Clearly, 1172 is the wrong number and it should be
replaced by 1174.