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    Question

    Interchanging which two signs will make the following

    equation correct?15 + 3 × 9 – 4 ÷ 16 = 57
    A + and - Correct Answer Incorrect Answer
    B – and ÷ Correct Answer Incorrect Answer
    C – and × Correct Answer Incorrect Answer
    D + and ÷ Correct Answer Incorrect Answer

    Solution

    Given: 15 + 3 × 9 – 4 ÷ 16 = 57

    d) + and ÷

    15 ÷ 3 × 9 – 4 + 16 = 57
    => 5 × 9 – 4 + 16 = 57
    => 45 – 4 + 16 = 57

    => 61 – 4 = 57
    => 57 = 57

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