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If ‘’ + means ‘-’, ‘-’ means ב’, ב’ means ‘÷’, ÷‘’ means ‘+’, what will come in place of the question mark (?) in the following equation? Equat
Question

If ‘’ + means ‘-’, ‘-’ means ב’, ב’ means ‘÷’, ÷‘’ means ‘+’, what will come in place of the question mark (?) in the following equation? 
Equation: 25×5÷7-10×2=?

A.

38

B.

39

C.

41

D.

40

Correct option is D

Given Equation: 25×5÷7-10×2=?
Original Sign 
+
-
÷
×
New sign
-
×
+
÷
New Equation;
 25÷5+7×10÷2 = ?
now solve according to BODMAS 
Operation preference wiseSymbolBrackets[],,()Orders,of(power),(root),ofDivision÷Multiplication×Addition+Subtraction\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}​​
= 25÷5+7×10÷2
= 5+7×5
= 5+35
= 40
Thus, the correct answer is (d) 40.​​

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