Răspuns:
Ex 9. a) 103, 105, 107
b) 398, 400, 402
Ex 11. a) 20, 23, 30, 32
b) 20+23+30+32=105
Ex 12. 1004, 1014, 1024, 1034, 1040, 1041, 1042, 1043, 1044, 1045, 1046, 1047, 1048, 1049, 1054, 1064, 1074, 1084, 1094, 1104, ....
Ex. 13. a) 15, 18, 21
b) 30
c) 150
Ex. 14
a) 123
b) 978
c) 10 (30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
