GRE
The units digit of $$h$$
2
The length of QR
The length of ST
x+y
90
The combined area of the 4 shaded regions
96
The number of circles that pass through at least three of the four endpoints
$$C_{12}$$
($$49^{7}$$)$$C_{26}$$
$$\frac{100!}{99!}$$
$$\frac{ (100!-99!)}{98!}$$
25000 +道题目
236本备考书籍