In the following number series, a wrong number is given. Find out that wrong number.
7 9 16 25 41 68 107 173
(a) 107 (b) 16 (c) 41 (d) 68 (e) 25
(d) The series is based on the following pattern : 7 + 9 = 16 9 + 16 = 25 16 + 25 = 41 25 + 41 = 66; 68 41 + 66 = 107 66 + 107 = 173 Clearly, 68 should be replaced by 66
