Question

The average of 5 consecutive odd numbers is 27. What is the product of the first and the last number?

• A. 621
• B. 667
• C. 713
• D. 730

Answer 1

Answer:

C. 713

[x + (x + 2) + (x + 4) + (x + 6) + (x + 8)]/5 = 27 x + (x + 2) + (x + 4) + (x + 6) + (x + 8) = 135 5x + 20 = 135 5x = 115 x = 23 required product = 23 ⨯ [23 + 8] = 23 ⨯ 31 = 713