1.  The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers ?
A. 2
B. 5
C. 8
D. Cannot be determined
E. None of these

Answer: Option C

Explanation:

Let the number be x, x + 2,  x + 4, x + 6, and x + 8.

Then,

x + (x + 2) + (x + 4) + (x + 6) + (x + 8)   = 61

                                     5

5x + 20 = 305

x = 57

So, required  difference = (57 + 8) - 57 = 8