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Determina toate numerele de trei cifre ce pot fi formate, folosind o singura data cifrele; 0,7,5si 9

Răspuns :

705, 709, 750, 759, 790, 795, 
507, 509, 570, 579, 590, 597
907, 905, 950, 957, 970, 975
9075, 9057, 9507, 9570, 9705, 9750,7059, 7095, 7509, 7590, 7905, 7950, 
5079, 5097, 5709, 5790, 5907, 5970