GRE
The number of 3-digit integers all of whose digits are even (the same number could be used for more than once)
The number of 3-digit integers all of whose digits are odd (the same number could be used for more than once)
The total number of 4-digit positive integers that can be formed using only the digits in set S
The total number of 3-digit positive integers that can be formed using only the digits in set T
$$(d^{2})!$$
$$(d!)^{2}$$
14!
15!-14!
The area of the shaded area
15
Length of AO
Length of AB
The length of AB
The average (arithmetic mean) of the lengths of AC and AD
The radius of the circle
5.5
25000 +道题目
7本备考书籍