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      Question

      Average of five consecutive odd numbers is 17. What is the

      largest of the given five numbers?
      A 40 Correct Answer Incorrect Answer
      B 21 Correct Answer Incorrect Answer
      C 28 Correct Answer Incorrect Answer
      D 30 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the first number be 'x'

      Therefore, the five consecutive odd numbers will be 'x', (x + 2), (x + 4), (x + 6), (x + 8)

      ATQ:

      x + (x + 2) + (x + 4) + (x + 6) + (x + 8) = 5 × 17

      Or, 5x + 20 = 85

      Or, 5x = 85 - 20

      Or, 5x = 65

      Or, x = 65 ÷ 5 = 13

      Therefore, the first number = 13

      So, the largest or the last number is = (x + 8) = 13 + 8 = 21

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