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

D. 57

Choose or find odd number - 263 , 111 , 242 , 551 , 383

E. 383

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

C. 109

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

C. 81

Choose or find odd number - 27 , 125 , 343 , 729 , 1321

E. 1321