Four numbers have been given, out of which three are alike in some manner and one is different. Select the one that is different.

197 193 195 191

195

THE LOGC; 1) 197, It is a prime number.      (prime number that is divisible by 01 or itself) 2) 193, It is a prime number. 3) 195 It is not a prime number. 4) 191, It is a prime number. Thus, 195 is the odd one.