Răspuns :

ex12.

a)732,762,702;

b)951,954,957;

c)2031,2034,2037;

d)240,540,840;

ex15

a)153;

b)279;

c)3132;

d)567;

e)12060,12600,12330,12150,12240,12330,12420,12510,12690,12780,12870,12960;

f)8208,1278,7218,2268,5238,3258,6228,9288,8298,