Răspuns:
Explicație pas cu pas:
numar d e trei cifre ar fi de forma xyz unde x - sute y- zeci z - unitati
x=2 si y=6 z poate fi d e la 0 la 9
se vor forma urmatoarele numere 260,261,262,263,264,265,266,267,268,269
a=189 , c=1434 iar b poate fi 260,261,262,263,264,265,266,267,268,269
a+b+c=189+260+1434=1883
a+b+c=189+261+1434=1884
a+b+c=189+262+1434=1885
a+b+c=189+263+1434=1886
a+b+c=189+264+1434=1887
a+b+c=189+265+1434=1888
a+b+c=189+266+1434=1889
a+b+c=189+267+1434=1890
a+b+c=189+268+1434=1891
a+b+c=189+260+1434=1892
