1) 40,45,50,55,60,65,70
2) a) 2232
b) -
c -
3) a) a2a / 2 = 120,122,124,126,128 etc ( primul a nr nat 1-9 )
b) 2a2a / 5 = 2120,2125 etc ( primul a este nr nat 1-9
c) 3cd / 10 = 310,320,330,340,350,360,370,380,390
d) 4a3 = 423
e) -
f) -
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