Range[1, 9, 2]* Range[3, 11, 2] comes out to be {3, 15, 35, 63, 99} why is it 3,15,35,63,99?
May I suggest a divide and conquer approach?
What does Range[1, 9, 2] do? What does Range[3, 11, 2] do? What does "*" (Times) do when given lists?
Why should it be anything else?
In slightly more detail:
(1) What result are you expecting that is different?
(2) What have you checked in documentation that you are not understanding?
...and if you were trying to compute the dot product, look up Dot in the Documentation Center.
