Răspuns:
30,40,50,60,70,80,90 nr nat mai mari decât 20
10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46 48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98 nr pare crescător
71,73,75,77,79,81,83,85,87,89,91 nr impare