5 a) = 9 d) = 20
b) = 11 e) = 29
c) = 28 f) = 23
6 ) cresc cu 2 = 8, 10, 12, 14, 16, 18, 20
scad cu 2 = 23, 21, 19, 17, 15, 13, 11
scad cu 2 = 30, 28, 26, 24, 22, 20,18
cresc cu 2 = 17, 19, 21, 23, 25, 27, 29
