1)a-b=308
a:b=8 rest 35
a=8b+3b
8b+35-b=308
7b+35=308
7b=308-35
7b=273
b=39
2)23ab:42=x rest 0
cel mai mic:2300:42=54 rest 32 =>X > 54
cel mai mare:2399:42=57 rest 5=>X < 57
=>54<X<57
23ab={55*42;56*42;57*42}
nr.sunt:2310,2352 si 2394
3)a+b+c):8=r cat=13⇒
⇒restul<13⇒R=(1,2,3,4,5,6,7,8,9,10,11,12)⇒
a:8=13(R x)
a:37=r(cr)
a=37+c=38c
104+105+106+107+108+109+110+111=860) suma numerelor