Răspunsuri

2014-09-23T14:01:22+03:00
2014-09-23T14:33:10+03:00
1 + 7 = 8
2 + 6 = 8
............
8 + 0 = 8
17, 26, 35, 44, 53, 62, 71, 80 - aceste sunt nr. de forma ab