Question

gaseste patru nr.naturalre de forma abc (a#b#c)astfel incat fiecare nr. sa se imparta la suma cifrelor sale.

Answer 1

   
[tex]140 ~~~\Longrightarrow~~~1+4+0 = 5 ~~~\Longrightarrow~~~140 ~\vdots ~5 ~~~\Longrightarrow~~~140:5=28 \\ \\ 230 ~~~\Longrightarrow~~~2+3+0 = 5 ~~~\Longrightarrow~~~230 ~\vdots ~5 ~~~\Longrightarrow~~~230:5=46 \\ \\ 320 ~~~\Longrightarrow~~~3+2+0 = 5 ~~~\Longrightarrow~~~320 ~\vdots ~5 ~~~\Longrightarrow~~~320:5=64 \\ \\ 410 ~~~\Longrightarrow~~~4+1+0 = 5 ~~~\Longrightarrow~~~410 ~\vdots ~5 ~~~\Longrightarrow~~~410:5=82[/tex]