GRE
$$\frac{1}{9}$$ of $$x$$
$$11$$ percent of $$x$$
The sum of the nine integers
30
The number of different positive factors of r
The number of different positive factors of s
The area of triangular region A
The area of triangular region B
x
60
$$(0.001)^{-1}+(0.999)^{-1}$$
$$(0.002)^{-1}+(0.998)^{-1}$$
25000 +道题目
5本备考书籍