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    Question

    Instead of multiplying a number by 0.9, a student

    accidentally used 9. His result turned out to be 3510 more than the actual result. What is the original number? (Calculate approximate number)
    A 320 Correct Answer Incorrect Answer
    B 250 Correct Answer Incorrect Answer
    C 290 Correct Answer Incorrect Answer
    D 433 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let original number be ‘x’

    So, 9x – 0.9x = 3510

    Or, 8.1x = 3510

    Or, x = 433.33 or 433 approx.

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