Pai numere de forma abc inseamna numerele de 3 cifre, suma 10 inseamna ca a+b+c=10.
Dar a≠0.
Deci numerele pot fi
pentru a=1.
109,118,127,136,145,154,163,172,181,190.
a=2
208,217,226,235,244,253,262,271,280
a=3
307,316,325,334,343,352,361,370
a=4
406,415,424,433,442,451,460
a=5
505,514,523,532,541,550
a=6
604,613,622,631,640
a=7
703,712,721,730
a=8
802,811,820
a=9
901,910.
Astea sunt toate.
