Question 24

Which two signs should be interchanged to make the given equation correct?
$$20 + 5 \times 3 \div 3 - 1 = 14$$

Solution

Going by the options,

D) interchanging $$\times\ \ and \ +\ $$

$$20\ \times\ 5\ +\ 3\ \ \ $$ 3 ÷ 3$$\ -\ 1\ne\ 14$$

c) $$\times\ \ and\ \ -\ $$

$$20\ \ +\ 5\ -\ 3\ $$ ÷ $$3\times\ 1\ne\ 14$$

B) ÷ and $$\times\ $$

$$20\ +\ 5$$ ÷ $$3\times\ 3\ -\ 1\ne\ 14$$

A) ÷ and $$\ +\ $$

20 ÷ 5$$\ \times\ 3\ +\ 3\ -\ 1$$ = 14

(Explanation is required)

Hence option A is the correct answer

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Which two signs should be interchanged to make the given equation correct?$$20 + 5 \times 3 \div 3 - 1 = 14$$