Choose or find odd number - 144 , 168 , 196 , 256

B. 168

Choose or find odd number - 35 , 49 , 50 , 63 , 140

C. 50

Choose or find odd number - 2 , 16 , 56 , 128

C. 56

Choose or find odd number - 140 , 240 , 360 , 480

A. 140

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

D. 57