Given the vertices in vectors X,Y, return the area of the polygon they define.
Matrix indexing with two vectors of indices
Sum the Digits of a Number
Given a square and a circle, please decide whether the square covers more area.
A shooting competition
Probabilities - Balls and urns - 02
Probabilities - Balls and urns - 01
Geometrical meaning of determinant
Non trivial identities - flipping
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