Question Number 58885 by naka3546 last updated on 01/May/19
$${How}\:\:{many}\:\:\mathrm{4}−{digits}\:\:{number}\:\:\:{abcd}\:\:\:{that} \\ $$$${satisfy}\:\:\:\:{a}\:\:\leqslant\:\:{b}\:\:\leqslant\:\:{c}\:\:\leqslant\:\:{d}\:\:\:\:{multiply}\:\:\:{of}\:\:\:\mathrm{3}\:.\: \\ $$
Commented by mr W last updated on 02/May/19
$$=\mathrm{165} \\ $$$${in}\:{checking}... \\ $$
Commented by naka3546 last updated on 03/May/19
$${how}\:\:{to}\:\:{get}\:\:{it}?\:\:{please}\:\:{notify}\:\:{me}\:,\:{sir}\:. \\ $$