Choose or find odd number - 7 , 15 , 31 , 57

D. 57

Choose or find odd number - 392 , 326 , 414 , 248

A. 392

Choose or find odd number - 21 , 69 , 81 , 83

C. 81

Choose or find odd number - 45 , 99 , 109 , 126 , 207

C. 109

Choose or find odd number - 1532 , 8749 , 4268 , 5846 , 6137

C. 4268