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    Question

    The ratio between two numbers is 7:8. If each number is

    increased by 9, the ratio between then become 10:11, find the difference between numbers.
    A 3 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 6 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer
    E 9 Correct Answer Incorrect Answer

    Solution

    Let first number be 7x and the second number is 8x. According to the question, => (7x + 9)/(8x + 9) = 10/11 => 77x + 99 = 80x + 90 => x = 3 Required difference = 8x – 7x = x = 3

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