If the average (arithmetic mean) of five consecutive negative integers is 2k-1, what is the difference between the greatest and least of the five integers?
Mean & Median of consecutive integers are same. Since we know the median and since we know that all integers are consecutive, we can add 2 to 2k-1 to get the highest number and deduct 2 from 2k-1 to get the lowest number. Based on this, we can get the difference.
HTH
