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    Question

    A number increases by 20% and becomes X. If X is later

    decreased by 25%, the final value is 180. Find the original number.
    A 200 Correct Answer Incorrect Answer
    B 250 Correct Answer Incorrect Answer
    C 225 Correct Answer Incorrect Answer
    D 325 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let original be N. After 20% rise: 1.2N Then drop 25%: 0.75 × 1.2N = 0.9N = 180 N = 180/0.9 = 200

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