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    What will come in place of the question mark (?) in the following equation if ‘+’ and ‘×’ are interchanged and ‘–’ and ‘÷’ are interchanged?16 − 2 × 4
    Question

    What will come in place of the question mark (?) in the following equation if ‘+’ and ‘×’ are interchanged and ‘–’ and ‘÷’ are interchanged?
    16 − 2 × 42 + 13 ÷ 12 = ?

    A.

    560

    B.

    542

    C.

    950

    D.

    762

    Correct option is B

    Given: 16 − 2 × 42 + 13 ÷ 12 = ?
    Operation preference wiseSymbolBrackets[],,()Orders, of(power),(root),ofDivision÷Multiplication×Addition+Subtraction\begin{array}{|c|c|} \hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\\hline\end{array}​​
    Old signs
    +
    -
    New signs
    ×
    ÷
    After interchanging the signs equation will be: 
    16 ÷ 2 + 42 × 13 - 12 = ?
    8 + 546 - 12 = ? 
    554 - 12 = ? 
    ? = 542
    Thus, the correct option is (b) 542.

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