Which two signs should be interchanged to correct the given equation? 3 × 6 + 2

Question

Which two signs should be interchanged to correct the given equation?
$3 \times 6 + 2 - 4 \div 8 = 13$

This question was previously asked in

RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)

$+$ and $\times$

$+$ and $-$

$\times$ and $-$

$\div$ and $+$

The correct answer is

$\div$ and $+$

Equation Correction: Interchange Signs

The problem requires us to interchange two mathematical signs in the given equation to make it true. The original equation is:

$3 \times 6 + 2 - 4 \div 8 = 13$

First, let's evaluate the original equation using the order of operations (PEMDAS/BODMAS):

The original equation evaluates to $19.5$, not $13$. We need to test the given options.

The correct answer indicates that interchanging the division ($\div$) and plus ($+$) signs corrects the equation. Let's verify this.

The signs to be interchanged are $\div$ and $+$.

The original equation is: $3 \times 6 + 2 - 4 \div 8 = 13$.

After interchanging $\div$ and $+$, the equation becomes:

$3 \times 6 \div 2 - 4 + 8 = 13$

Now, let's evaluate this new equation using the order of operations:

The equation now correctly evaluates to $13$. Therefore, interchanging the $\div$ and $+$ signs is the correct solution.

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