the roach motal plays well, but there is a blank scroll in 1N.

I'm guessing it should say something like 'Security keycard only!'

Having math puzzles is interesting, although it doesn't work extremely well with JtRH currently because of the orb-door associations being visible when you click an orb. You probably don't have JtRH, which is probably the reason (there are other ways of coming up with something like this, where you have to hit a certain orb etc).

Being a mathematician, I have to point out a couple of things in the actual puzzles -

Click here to view the secret text

×If the square root of x minus 4 equals 5..

From the answers you can tell that you mean the square root of (x minus 4), but it could be (the square root of x) minus 4..

Click here to view the secret text

×What is the square root of 4?

OK, I'm sure there could be a bit of an argument over this but the main fact is that when you say the square root of 4 you always mean the principal square root 2.. whereas there are two answers to x squared = 4.

In either case you're wrong somewhere - the question about the sqrt of 1/4 should be 1/2 or -1/2 if you're going to be consistent

Interesting idea anyway, will be interesting to see how it progresses.