[tex]\overline{87ab} \: \: \vdots \: \: 2 = > b \: \in \: \left\{0,2,4,6,8\right\}[/tex]
[tex]a \: \in \: \left\{0,1,2,3,4,5,6,7,8,9\right\}[/tex]
[tex]8 + 7 + a + b = 29[/tex]
[tex]15 + a + b = 29[/tex]
[tex]a + b = 29 - 15[/tex]
[tex]a + b = 14[/tex]
[tex]pt. \: b = 6 = > a = 8[/tex]
[tex]8 + 6 = 14[/tex]
[tex]pt. \: b = 8 = > a = 6[/tex]
[tex]6 + 8 = 14[/tex]
=> Numerele sunt : 8768,8786.
