In the following series one number is wrong, find out the wrong number. 201, 200, 194, 184, 167, 141, 104

Explanation

The pattern is as follows: Taking difference ⇒ 201 − 200 = 1 (201 − 199 = 2); 200 − 194 = 6 (199 − 194 = 5); 194 − 184 = 10; 184 − 167 = 17; 167 − 141 = 26; 141 − 104 = 37. Taking difference again ⇒ 5 − 2 = 3; 10 − 5 = 5; 17 − 10 = 7; 26 − 17 = 9; 37 − 26 = 11. If there is 199 in place of 200 then we get the series: 3, 5, 7, 9 and 11. ∴ 200 is wrong and should be replaced by 199.