Răspuns :
Fie a un numar par => a+a+2+a+4+a+6=404 => 4a=404-12 => a=392/4=98
=> numerele sunt 98, 100, 102 si 104
=> numerele sunt 98, 100, 102 si 104
a+b+c+d=404
b=a+2
c=a+4
d=a+6
404-12=392
392:4=98
⇒a=98
98+2=100
⇒b=100
100+2=102
⇒c=102
102+2=104
⇒d=104
Verificarea:98+100+102+104=404
Succes!
b=a+2
c=a+4
d=a+6
404-12=392
392:4=98
⇒a=98
98+2=100
⇒b=100
100+2=102
⇒c=102
102+2=104
⇒d=104
Verificarea:98+100+102+104=404
Succes!