Question about different number-type values

So I've been finding my own aobs for a bit now, but I'm confused about a couple of little things.

If I want to change "24 ??" to a value, I know that 24 7f is as high as I can make that value, at 127.
I know I can go to higher values with "25 ?? ??" but I don't know what I can put in the ?? ?? to give me the highest value possible for that number type.

Are the values for 2D and 2E the same as 24 and 25?
Also, with "2f ?? ??" I'm completely lost when figuring out what values translate into what decimal numbers.

the biggest short (25) is 0x7FFF or 32767. Usage is obviously, 25 7f ff

I dont know what 2d/2e are off the top of my head. Given that I dont know what they are, I can safely assume they work the same as 2f (push double). I.e. the values are stored in a special "dictionary" called the _____ something or other (i forget). Anyways if you want to use a double, you will need to look it up in the code in other parts and see what "page number" its on in the "dictionary". If you know what I mean.