GRE
The fraction of the integers greater than 1 and less than n that are prime numbers
$$\frac{1}{2}$$
p
4
The probability that neither E nor F occur
0.20
2n
900
<2a, 4b>
<4a, 2b+1>
The sum of the first n positive prime numbers
The sum of the first n positive integers
The number of different prime factors of $$n$$
m
5
R
0
The remainder when $$3^{4n+2}+5$$ is divided by 10
The smallest integer $$n$$, $$n$$ > 2, such that $$n-2$$ is divisible by 3, 4, 5, and 6
362
25000 +道题目
199本备考书籍