If '+' means '-', '$$\div$$' means '+', '-' means '$$\times$$', and '$$\times$$' means '$$\div$$', then, what is 25 - 3 $$\div$$​ 5 + 10 = ?​

Given: 25 - 3 $$\div$$​​ 5 + 10 = ?

Using BODMAS rule.

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

New equation: 25 $$\times$$​ 3 + 5 - 10 = ?

75 + 5 - 10 = ?

80 - 10 = ?

? = 70

Thus, correct option is (b).