Need help with Autonumber Format

This is certainly possible! assuming I've understood the question correctly, of course …

All you need is a pair of paragraph formats, one for the questions and one for the answers, and a character format for the labels. Set the paragraph properties so that the numbering can be outdented, and set the numbering properties to add Q (or A, depending) followed by a sequence indicator and a tab. Here's a screenshot of how I'd do it for the questions.

And here's a bit more explanation of how the Autonumber format works its magic …

• the Q: at the very start is the series label, and the colon is an essential part of the definition. By including a series label, you can set up different series; for example to number tables and figures separately.
• after the series label, Q {space} is the text that will be included before the counter; <n+> is the building block for a numeric counter that will increment by 1; the full stop after the building block is another piece of text, and \t is a tab character.
• the character format identifies a, well, character format that is applied to anything generated by the autonumbering; the format I've used just happens to be set to light grey.

This already gives an idea of how elegant FM numbering can be. Icing on the cake in this case is that thanks to the series label you can also display the current value of the counter for the answer. The autonumber format I've used for answers is Q:A <n>.\t

• the Q: is the same series label
• A{space} is the text, and <n> is the building block for 'current value of counter identified by this series label'

If your document simply alternates single-paragraph questions and single-paragraph answers, you can save yourself time by using the Next Paragraph Tag option to follow questions by answers and vice versa. You'll be amazed by how quickly you'll have your Q&A ready :-}