This isn't elegant or cool, but you can do this:

Go into Excel

In cells A1, A2, and A3 enter 1, 3, 5...

Now do a Fill Series (this automatically done by default) those numbers down as a group to say A15 (or ever how many questions you have)

Once done, you can do such things in Excel as select this group, then go to Numbering, and select treating the numbering as Text, so this will enable you to make your numbers 1., 3., 5....

Go into Word, and Paste Special and then select Paste as "Unformatted Text" so you will see 1, 3, 5, 7, and so on

Treat this numbering the same as with any numbering now