GRE
p
17
The number of prime numbers between 50 and 60
The number of prime numbers between 80 and 90
xy
70
b
8
The number of prime numbers divisible by 13
The number of prime numbers divisible by 2
The number of prime numbers that are divisible by 9
The number of prime numbers that are divisible by 19
The greatest prime factor of 40K
The greatest prime factor of 39K
The greatest prime factor of 49K
The greatest prime factor of 50K
The number of prime factors of n
The number of prime factors of $$\frac{n}{2}$$
The number of different prime factors of 2n
The number of different prime factors of $$n^{2}$$
25000 +道题目
236本备考书籍