Question

    The average of five consecutive even numbers is 20. Find

    the second largest number.
    A 18 Correct Answer Incorrect Answer
    B 22 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 even numbers will be 'x', (x + 2), (x + 4), (x + 6), (x + 8)

    ATQ:

    x + (x + 2) + (x + 4) + (x + 6) + (x + 8) = 5 × 20

    Or, 5x + 20 = 100

    Or, 5x = 100 - 20

    Or, 5x = 80

    Or, x = 80 ÷ 5 = 16

    Therefore, the first number = 16

    Second largest number = (x + 6) = 16 + 6 = 22

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