Question 36
If $$+$$ means $$−$$, $$−$$ means $$\times$$, $$\times$$ means $$\div$$, and $$\div$$ means $$+$$, then what will be the value of following expression?
$$12 - 3 + 15 \times 5 \div 6 = ?$$
Solution
Given expression $$12 - 3 + 15 \times 5 \div 6 = ?$$
$$12 \times 3 -15 \div 5 + 6 = ? $$ ( We change the Sign according to given in question)
$$\Rightarrow 12 \times 3 -3 + 6 = ? $$
$$\Rightarrow 36 -3 + 6 = ? $$
$$\Rightarrow 42 -3 = ? $$
$$\Rightarrow 39 = ? $$
$$\Rightarrow ? = 39 $$Ans
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