[tex]Descompunem ~ in ~ factori~primi: \\
120 = 2^3 \times 3 \times 5 \\
x = 2^3 \times 3 = 8 \times 3 = \boxed{24} \\
y = \boxed{5} \\
x \times y = 24 \times 5 = \boxed{120} \\
x + y = 24 + 5 = \boxed{29} \\
Ultima ~cifra~a~lui~ ~ 29 = \boxed{9}
[/tex]
