What will come in the place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
5 – 4 ÷ 9 + 80 × 10 = ?

‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged.

Logic: interchange mathematical operators and solve as per BODMAS rule.

​$$\begin{array}{|c|c|} \hline \textbf{Operation preference wise} & \textbf{Symbol} \\\hline Brackets &[],{}, () \\ \hline Orders, of & (power), √ (root) , of \\ \hline Division& ÷ \\ \hline Multiplication & × \\ \hline Addition & + \\ \hline Subtraction & - \\\hline \end{array}$$​​

Given:

5 – 4 ÷ 9 + 80 × 10 

After interchanging,

5 + 4 × 9 - 80 ÷ 10 

= 5 + 36 - 8

Thus, option A is correct.