GRE
The remainder when 4*$$10^{n}$$+47 divided by3
1
The average of all the interior angles inside a quadrilateral
The average of all the interior angles inside a pentagon
$$\frac{1}{a} - \frac{1}{b} $$
$$\frac{1}{100} - \frac{1}{1000} $$
s
$$\frac{4t}{7}$$
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