Răspuns :
Numerele de 4 cifre care au suma numerelor 3 sunt:
-1101
-2001
-1011
-1110
-2100
-3000
-2010
-1101
-2001
-1011
-1110
-2100
-3000
-2010
1110, 1101,1011,1200,1020,1002,2100,2010,2001
Cred ca.s toate :))