Răspuns :
Răspuns:
140,145,240,245,340,345,440,445,540,545,640,
645,740,745,840,845,940,945,040,045
adică sunt 20 de numere naturale
5|a4b=>b€{0,5}
Pt. b=0=>a{1,2,3,...,9}~9nr}
Pt. b=5=>a{1,2,3,...,9}~9nr}
=>9+9=18 nr
SPER CA TE-AM AJUTAT
Răspuns:
140,145,240,245,340,345,440,445,540,545,640,
645,740,745,840,845,940,945,040,045
adică sunt 20 de numere naturale
5|a4b=>b€{0,5}
Pt. b=0=>a{1,2,3,...,9}~9nr}
Pt. b=5=>a{1,2,3,...,9}~9nr}
=>9+9=18 nr
SPER CA TE-AM AJUTAT