Multiple Choice Questions on The arithmetic mean of two numbers is 10 and their geometric mean is 8 What are the two numbers ........ for CDS Exam Preparation

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Multiple Choice Questions

The arithmetic mean of two numbers is 10 and their geometric mean is 8 What are the two numbers ........

Quantitative Aptitude (CDS) Simplification
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    The arithmetic mean of two numbers is 10 and their geometric mean is 8. What are the two numbers?

    15,5

    Incorrect Answer

    12,8

    Incorrect Answer

    16,4

    Correct Answer

    18,2

    Incorrect Answer
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    Explanation:

    Let the two numbers be a and b

    (a + b)/2 = 10

    a + b = 20

    Also, √ab= 8, ab = 64, a=64/b

    Solving the above 2 equations, a = 16 and b = 4

    By: Munesh Kumari
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