If $$+$$ means $$-$$, $$-$$ means $$\times$$, $$\times$$ means $$\div$$, and $$\div$$ means $$+$$, then what will be the value of following expression?
$$15 - 2 \div 90 \times 9 + 10$$
 Given expression $$15 - 2 \div 90 \times 9 + 10$$
$$15 \times 2 + 90 \div 9 -10$$ ( we change Sign according to the given question)
$$\Rightarrow 15 \times 2 + 10 -10$$
$$\Rightarrow 30Â + 10 -10$$
$$\Rightarrow 40 -10$$
$$\Rightarrow 30 $$ AnsÂ
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