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    Question

    The first number is four times 60% of the second number.

    If the second number is increased by 5, the first number becomes twice the new value of the second number. What is the value of the first number?
    A 30 Correct Answer Incorrect Answer
    B 40 Correct Answer Incorrect Answer
    C 50 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer
    E 80 Correct Answer Incorrect Answer

    Solution

    Let the first number be a and the second number be b According to the question, a = 4 × 0.6b = 24b And, a = 2(b + 5) Or, 2.4b = 2b + 10 Or, 0.4b = 10 Or, b = 10/0.4 = 25 Therefore, 1st number = 2.4b = 60

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