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Folosind cifre impare diferite,cate numere de trei cifre se pot scrie ??
Dau coroana !!


Răspuns :

133 ,135 ,137 ,139 ,153 ,155 ,157 ,159 ,173 ,175 ,177 ,179 ,193 ,195 ,197 ,199 ,311 ,313 ,315 ,317 ,319 ,513 ,515 ,517 ,519 ,711 ,713 ,715 ,717 ,719 ,911 ,913 ,915 ,917 ,919, 111 ,333 ,555 ,777 ,999.