Let the number be $x$. Since $x^{2} = 6x$, therefore $x=6$. 
A square of a positive number is $$500\textbackslash\%$$ greater than that number. What number is it? 

[1] $$5$$ 
[2] $$6$$ 
[3] $$7$$ 
[4] $$8$$ 
[5] $$10$$ 