Sadly, there are none at all. I've done thousands of things on it and I have 639 stickers. The only thing you can do is try to beat the all of the sets on Skill sets, then replay them when you have finished them all. You can do this technique, on any other game in this website, and it works very well.
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It depends on the math problem, some how you have to work the pattern into the math problem. and you will need to figuer if you can prodict if it is right.
First of all Its "What is unkown math" and it is math that isunknown DDUUHH!!
you play the math games
just work hard.do the math.
first click F12