Question Number 167737 by HongKing last updated on 24/Mar/22
$$\mathrm{3}\:\:\:\Box\:\:\:\mathrm{4}\:\:\:\rightarrow\:\:\:\mathrm{27} \\ $$$$\mathrm{4}\:\:\:\Box\:\:\:\mathrm{2}\:\:\:\rightarrow\:\:\:\mathrm{36} \\ $$$$\mathrm{2}\:\:\:\Box\:\:\:\mathrm{7}\:\:\:\rightarrow\:\:\:\mathrm{18} \\ $$$$\mathrm{1}\:\:\:\Box\:\:\:\mathrm{9}\:\:\:\rightarrow\:\:\:? \\ $$
Answered by Rasheed.Sindhi last updated on 24/Mar/22
$$\begin{array}{|c|}{\underset{\:\:\:\:\:\:\:\:\:\:\:\:} {{x}\:\Box\:{y}={x}×\left({y}/{y}\right)×\mathrm{9}}\:=\overset{\mathrm{or}} {{x}×{y}^{\mathrm{0}} ×\mathrm{9}}=\overset{\mathrm{or}} {{x}×\mathrm{9}}}\\\hline\end{array} \\ $$$$\mathrm{3}×\left(\mathrm{4}/\mathrm{4}\right)×\mathrm{9}=\mathrm{27} \\ $$$$\mathrm{4}×\left(\mathrm{2}/\mathrm{2}\right)×\mathrm{9}=\mathrm{36} \\ $$$$\mathrm{2}×\left(\mathrm{7}/\mathrm{7}\right)×\mathrm{9}=\mathrm{18} \\ $$$$\mathrm{1}×\left(\mathrm{9}/\mathrm{9}\right)×\mathrm{9}=\mathrm{9} \\ $$