Mystery's Riddle 2 - Advanced Alien School

[Mistery]

This is the Advanced Alien School, and this time you won't just enter my spaceship, but travel around with me. But I must warn you, only the most intelligent human beings are able to finish this journey, and come back to Earth safely.
Good luck, and have fun

There are 48 levels plus 20 University stages to solve.

UPDATE: Level 37 has been fixed since the content got out-dated.

Play

WARNING ~ USE SPOILER TAGS WHEN NECESSARY.
DO NOT GIVE SOLUTIONS. GIVE HINTS ONLY.
THIS IS HOW YOU MAKE SPOILERS ~
[spoiler=Title Here]Enter text here...[/spoiler]

[Patricia73]

yeahhhhhhh number two

going to give it a try

[umpthis31]

feeling a little thick..cant get level 1

[Mistery]

I guess you know what it is all about.

Dictionary is off

Btw, you are three players to play it, I hope you can work together

[eyesofblue227]

Lol, time to start dragging out online encyclopedias. Science isn't my strong point here dear Alien!

[Mistery]

Well, it's Advanced Alien School

[eyesofblue227]

So I've gathered.
Hah, way overthinking again! Thanks Myst!

[umpthis31]

is that a spelling error on 3?

[Mistery]

Aliens do not make errors

I hope so...

[umpthis31]

nope..not an error

[eyesofblue227]

Hmm, thought I was on the right track with 6, but apparently not.
Edit, I was all along lol. Just can't spell today lol.

[umpthis31]

im still trying to find something to drink on 4

[Mistery]

Hmm, thought I was on the right track with 6, but apparently not.

I would guess you are

But pay attention to another clue aswell

[eyesofblue227]

Okay, I could use yet another hint. I'm at the "Go on" page and I've seen the three clues but still confused as to do what you want...?

[Mistery]

Well, do with your previous answer what the picture name tells you.

And the clue is again for a numeral system