Question

The average of eleven consecutive even numbers is 24.What is the difference between the highest and the lowest numbers?

• A. 20
• B. 18
• C. 10
• D. can not be determined

Answer 1

Answer:

A. 20

Sum of 11 consecutive even number is = 24 × 11 = 264 Sn = n/2(2a+(n−1)d) 264 = 11/2(2a + 10 × 2) 264 = 11/2(2a + 20) 2a + 20 = 48 a = 14 highest = 34 Difference = 34 - 14 = 20