In Choose odd Number questions, certain numbers are given, out of which all except one are alike in some manner while one is different and this number is to be chosen as the answer.

Choose or find odd number

325 , 236 , 178 , 639 , 538

A. 325
B. 236
C. 178
D. 639
E. 538
Answer: B . 236

Justification: In all other numbers, the last digit is the sum of the first two.