GRE
The remainder when $$k^{2}-k$$ is divided by $$2$$
$$0$$
The remainder when $$10^{8}$$+$$10^{9}$$+$$10^{10}$$+$$10^{11}$$ is divided by 11
0
$$P$$
$$Q$$
$$\frac{1}{3}$$(PR)
PS
$$\frac{1}{x}$$+$$\frac{2}{x}$$+ $$\frac{3}{x}$$
x +$$\frac{x}{2}$$+ $$\frac{x}{3}$$
The sum of the reciprocal of x and the reciprocal of y
1
$$ \frac{(a+1)^{▼}}{a^{2}}$$
$$|a-b|$$
$$3$$
The number of positive factors of 87
The number of positive factors of 97
The number of unique prime factors of 27
The number of unique prime factors of 12
25000 +道题目
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