GRE
The area of the square
The perimeter of the square
The circumference of a circle of radius r.
The arc length of a semicircle of radius (r + 1).
2 times the number of ways 4 books can be arranged on a shelf.
The number of ways 6 books can be arranged on a shelf
The probability of rolling a die and getting a prime number
The probability of rolling a die and getting an odd number
$$(3^{-1}+3^{-2})^{-1}$$
1
||$$(\frac{1}{3})ab$$
a+b
The shaded area
The unshaded area
Area of square I
Area of square II + area of square III
25000 +道题目
198本备考书籍
