1) What is your preferred format for manuscripts. Seems like a pretty basic thing but your post on where the page number should go shows that people seem to be all over the place on, well, placement. Things like which font to use, what the cover page should look like (genre, title, name, contact info), the margins (1" all around), how the chapters should be (typed numbers vs numerals), chapter start point (top of page or middle), or anything else that makes your job a little easier to do when you ask for a full manuscript. Most important, where does the copyright date and notice go? (Just kidding) Like I said at the top, I thought this was in a FAQ you already provided but I can't seem to find it now.
2) When do you use a numeral instead of typing out the number? I thought I read on your blog numerals for measurements (height, weight, etc.) and for numbers over 100 otherwise spell them out.
You're going to love this answer: I don't care.
When you include 3-5 pages in your query there aren't page numbers because it's electronic. There aren't margins. There's no cover page. There better not be chapters. And as long as the numbers are base 10, we're good.
On a full manuscript request, again, I don't care. Just make sure the info is THERE! DO number your pages. Do include a cover page with your contact details.
Industry standard fonts are TNR and/or Courier 12 pt but honestly in this day and age I can change anything you send to that with two clicks.
The stuff that makes me crazy is formatting done automatically by your word processing program cause I can't see it, and I can't fix it.
Turn all that fancy schmancy stuff off (like superscript for 3rd)
Any agent that gets her knickers in a wad about this kind of stuff is probably very old school. There's nothing wrong with that, it's just another piece of info you have about her.
Where formatting and style ARE important is when the book is sold and you have to turn in a manuscript that follows house style guides.
I think page numbers are in the lower right corner and your Name/Title are in the header section flush left on manuscript pages, but I've been taken to task for this by some pretty good agents so until I am Queen of the Known Universe (which frankly can't be soon enough) just make sure they're there, that's all.
The only time I got really cranky about this was when we were running a contest and didn't specify formatting on the novels submitted and ended up with a hodgepodge. It wasn't so much that everyone was wrong as it was they were not uniform.