In each of the following questions, one term in the number series is wrong. Find out the wrong term.
121, 143, 165, 186, 209
1)143
2) 165
3) 186
4) 209

Options

A. 143
B. 165
C. 186
D. 209

Answer

C

Explanation

Each term in the series is obtained by adding 22 to the preceding term.
So, 186 is wrong and must be replaced by (165 + 22), i.e. 187