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daca scri toate numerele naturale de la 1 la 100,atuncea de cate ori trebuie sa folosesti cifra 1

Răspuns :

De  19 ori.
1,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91
Succes!!
1-1
11,10,12,13,14,15,16,17,18,19-11
21,31,41,51,61,71,81,91-8
100-1
1+11+8+1=20 zerouri
COROANA??