Răspuns :
a) 505,555,565,575,585,595
b)707,717,727,737,747,757,767,777,787,797
c) 215,224,233,242,251,
a. 505,515,525,535,545,555,565,575,585,595;
b. 707,717,727,737,747,757,767,777,787,797;
c. 206,260,215,251,224,242,233;
b. 707,717,727,737,747,757,767,777,787,797;
c. 206,260,215,251,224,242,233;