Question Number 5446 by 3 last updated on 15/May/16
$$\mathrm{7} \\ $$
Answered by FilupSmith last updated on 15/May/16
$$=\mathrm{8}−\mathrm{1} \\ $$
Answered by Rasheed Soomro last updated on 15/May/16
$$\mathrm{7}=\mathrm{3}^{\mathrm{2}} −\mathrm{2} \\ $$$$\mathrm{It}\:\mathrm{is}\:\mathrm{equal}\:\mathrm{to}\:“\mathrm{first}\:\mathrm{odd}\:\mathrm{prime}\:\mathrm{raised} \\ $$$$\mathrm{to}\:\mathrm{the}\:\mathrm{power}\:\mathrm{2}\left(\mathrm{first}\:\mathrm{prime}\right)\:\mathrm{minus}\:\mathrm{first} \\ $$$$\mathrm{prime}\left(\mathrm{2}\right). \\ $$