GRE
$$(-1)^{n}(-1)^{n+2}$$
1
The remainder when $$3^{4n}$$ is divided by 10
The radius of the circle
6
The number of lines in the plane that pass through points P, Q and T
The least possible total number of patients that Dr. Bradley treated on the 5 working days last week
110
x
55
The remainder when $$n$$ is divided by $$31$$
$$16$$
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