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Can someone help me im at 99 percent on khan and i have the final skill at level one but i just can't get the mastery challege
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4 votes
Can someone help me

im at 99 percent on khan and i have the final skill at level one but i just can't get the mastery challege

User Michael Stum
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6 votes
I wish Mastery challenge is available when I finish a skill, and I not have to wait for 16 hours ... I can't belive that . 9 ... are the easiest way but it's only letting me do one at a time then making me wait. ... Math by grade.
User Zweedeend
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