In following questions, one term in number series is incorrect. - Find out the incorrect number 15, 16, 22, 29, 45, 70

Answer: B. 22

The pettern is + 1, + 4, + 9, + 16, + 25,....  i.e. + 12, + 22, + 32, + 42, + 52,...
So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.