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

8314, 2709, 1315, 2518, 3249

A. 8314
B. 2709
C. 1315
D. 2518
E. 3249
Answer: A . 8314


In all number except 8314, the sum of first three digits is equal to the unit's digit.
Hence, the answer is (a).