In following questions, one term in number series is incorrect. - Find out the incorrect number 445, 221, 109, 46, 25, 11, 4

Answer: B. 46

3 is subtracted from each number and the result is divided by 2 to obtain the next number of the series.
So , 46 is wrong and must be replaced by 109 - 3 / 2   i.e. 53.