Răspuns :
a) 71,72,73,74,75,76,77,78,79
b) 14,24,34,44,54,64,74,84,94
c) 31,42,53,64,75,86,97
d) 12,23,34,45,56,67,78,89
e) 18,27,36,45,54,63,72,81
b) 14,24,34,44,54,64,74,84,94
c) 31,42,53,64,75,86,97
d) 12,23,34,45,56,67,78,89
e) 18,27,36,45,54,63,72,81