I'm about to rip my head off (or someone else's)

So our school issues us these assignment notebooks, and they have odd little riddle things in them. I've got most of them but there are a few that are driving me compleatly insane because I can't just figure them out. So I decided to get help from people more brilliant than me because I may be considered a danger to society if I obsess over this any longer. Here they are:

1)The new science teacher claims he can place a beaker in the middle of the science lab and crawl into it. How?

2)You threw away the outside and cooked the inside. Then you ate the outside and composted the inside. What did you just eat?

3) This is a most unushual paragraph. It looks so ordinary that you'd think nothing was wrong with it-nothing is, but what's unushual about it?

4) forward I'm heavy, backward I'm not. what am I? (I got REALLY creative for this one, but no waffer I just can't get it)

So if some kind soul can give me their input, so I can move on from this. I'm starting to annoy people.

im a loser..

But its my birthday..so i can be..
heres another one:
how can u stand behind your best friend but at the same time your best frind is standing behind you?

1)The new science teacher claims he can place a beaker in the middle of the science lab and crawl into it. How?

--walking into the science lab perhaps?

2)You threw away the outside and cooked the inside. Then you ate the outside and composted the inside. What did you just eat?

-ill go with the corn too.

3) This is a most unushual paragraph. It looks so ordinary that you'd think nothing was wrong with it-nothing is, but what's unushual about it?

--unusual-unushual. the sh sound. brain notices the sounding and does not perceive the different spelling right away.

4) forward I'm heavy, backward I'm not. what am I? (I got REALLY creative for this one, but no waffer I just can't get it)

--ton seems pretty good answer for this one...forwad-increasing weight, backward-decreasing weight

idiot...spell ton backwards...

oo I feel a little silly. And for the paragraph thing, It's just my crap spelling there wasn't an error in the book. *blushes*

the first one because you don't say 'are' you say 'is'

18 + 19 isnt 36...

What is always coming but never arrives?

The begger was a girl

If papa bull eats 3 bails of hay, and baby bull eats 1 bail of hay, how much hay does mama bull eat?

There is no such thing as a mama bull

i only live untill you say my name, what am i?
on my way to scarborough fair i met a man with seven wives and each wife had seven kids and each kid had seven cats and each cat had seven rats. how many people were going to scarborough fair?

oh i only just figgured this out so i thought i would put it on here
What is always coming but never arrives?
tomorrow is always coming but never arrives, why? because there will always be a tomorrow:) smart arent i?
~pip xoxXxox
ps are you a james bond fan by any chance?

i only live until you say my name
- silence?

on my way to scarborough fair i met a man with seven wives and each wife had seven kids and each kid had seven cats and each cat had seven rats. how many people were going to scarborough fair?

- well only one, because if you met them they must have been going in the opposite direction, right?

polly your clever!
mexx
there are 2 men in a hotel, theyre rooms are 100 doors away from each other
but there living next to each other
how????

^Language?

(I think that's what it is, I discussed this with people for like an hour.. hehe)

haha nice, that's a good one.

...

Yes, the math is to distract you...People are prepared to get the number of people on the bus...but thats not the question. It strays you from the simple answer.

I know. I was going to say that, but then I hit my head...and forgot...everything.

3) This is a most unushual paragraph. It looks so ordinary that you'd think nothing was wrong with it-nothing is, but what's unushual about it?

- It's unusual, not unushual. ;x (Late)

Oh I just saw you say it was a typo. Sorry. ;x