GRE
The greatest possible value of x such that $$2^{x}$$ is a factor of n(n+2)(n+4)(n+6)
The greatest possible value of y such that $$2^{y}$$ is a factor of n(n+2)(n+4)(n+6) + 320
$$\frac{9^{17}}{8^{17}}$$
$$\frac{9^{17}+5^{10}}{8^{17}+5^{10}}$$
The ones digit of $$208^{208}$$
7
The standard deviation of the seven numbers $$-c, -b, -a, 0, a, b, c$$
The standard deviation of the seven numbers $$-c^{2}, -b^{2}, -a^{2}, 0, a^{2}, b^{2}, c^{2}$$
The standard deviation of data set Ⅰ
The standard deviation of data set Ⅱ
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