Question 38

Which two signs should be interchanged in the following equation to make it correct?

$$78 \div 6 \times 4 - 3 + 9 = 10$$

Solution

By Trial and Error method,

Option A

$$78\div6\times4+3-9=10$$

$$13\times4+3-9=10$$

$$52+3-9=10$$

$$46=10$$

Hence Option A is incorrect

Option B

$$78+6\times4-3\div9=10$$

$$78+6\times4-\frac{1}{3}=10$$

The value will be decimal after solving which is incorrect

Option C

$$78\div6-4\times3+9=10$$

$$13-4\times3+9=10$$

$$13-12+9=10$$

$$10=10$$

Hence, the correct answer is Option C

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