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A demonstration of the exam-level variable override feature. The student is shown the same question several times, but each instance is set up to suggest a different error in the process of computing the median of a sample. The first instance is very easy, and the last is pretty hard.

A question designed to demonstrate the exam-level variable overrides feature. The student must work out the median of a given sample. The exam can override size of the sample, the range of numbers to pick, and whether the sample should be shown to the student in increasing order.

A few questions showing how to use custom constants in different contexts.

In this question, the imaginary unit $\sqrt{-1}$ is written as $j$ instead of $i$.

The letters i, j and k are used to represent the standard 3D unit vectors.

In this question, $\tau$ represents the ratio of a circle's radius to its circumference, or $2\pi$.

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