GRE

The number of primes that are divisible by 9

The number of primes that are divisible by 19

AC

BC

a

18

The greatest prime factor of 490

The greatest prime factor of 500

The smallest number greater than 100 in the sequence

120

The perimeter, in inches of the figure above

300

$$(a+b)^{2}$$

$$(a-b)^{2}$$

$$\frac{R}{r}$$

1.5

25000 +道题目

4本备考书籍