The average of 7 consecutive numbers is 20. The largest of these numbers is : Pick:
A) 21 B) 22 C) 23 D) 24 E) 25
Explanation:   Let the numbers be x, x + 1, x + 2, x + 3, x + 4, x + 5 and x + 6,   Then (x + (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) + (x + 6)) / 7 = 20.   or 7x + 21 = 140 or 7x = 119 or x =17.   Latest number = x + 6 = 23. Answer: 23
<result>C</result>
The average of 7 consecutive numbers is 20. The largest of these numbers is :