Question Number 15787 by tawa tawa last updated on 13/Jun/17
$$\mathrm{Find}\:\mathrm{the}\:\mathrm{four}\:\mathrm{digits}\:\mathrm{number}\:\mathrm{such}\:\mathrm{that}\:\:\mathrm{4}\:\centerdot\:\mathrm{abcd}\:=\:\mathrm{dcba} \\ $$
Commented by mrW1 last updated on 13/Jun/17
$$\mathrm{I}\:\mathrm{found}\:\mathrm{only}\:\mathrm{4}×\mathrm{2178}=\mathrm{8712} \\ $$
Commented by tawa tawa last updated on 14/Jun/17
$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}.\:\mathrm{i}\:\mathrm{really}\:\mathrm{appreciate}. \\ $$