The average of a set of 15 consecutive even numbers is 64. What is the difference between the largest and the smallest numbers belonging to this set?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 28
Let 'a' be the first number of this set hence the next numbers will be
a + 2, a + 4, a + 6.......a + 28
Difference between the largest and the smallest numbers = (a + 28) - (a) = 28