Răspuns:
2b=par , 35=impar => 5a=impar
5a=impar => a=impar
a= 1 => b=15(F)
a=3 =>b=10(F)
a=5=>b=5(A)
a=7=>b=0(F)
a=1
b=15
a=3
b=10
a=5
b=7