Which two signs need to be interchanged to make the following equation correct?
$$72-63+3\times 4÷49=37$$

Let's test the options using the BODMAS rule to see which interchange satisfies the equation.Test Option B (Interchanging + and $÷$):Replace + with $÷$ and $÷$ with + in the expression:
$$72-63÷3\times 4+49$$
According to BODMAS:Division: $63÷3=21Multiplication:$ 21 \times 4 = 84$Substitution:$ 72 - 84 + 49$AdditionandSubtraction:$ 72 + 49 - 84 = 121 - 84 = 37$SinceLHSmatchesRHS($ 37 = 37$),interchanging+and$ \div$ is the correct choice.