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Cate dintre nr naturale cuprinse intre 300 si 350 contin:a) cifra 2, b) cifra 3,c)cel putin doua cifre identice,d)trei cifre identice,e) cifra 0si 8.

Răspuns :

a)302,312,320,321,323,324,325,326,327,328,329,332,342
b)303,313,323,343,
c)311,322,331,332,334,335,336,337,338,339,344,
d)333
e)308,
a)13 numere
b)63 numere
c)13 numere
d)1 numar
e)1numar