"...return a positive integer, y, which is the xth term ..." in de description.
I have a single line of code in my solution -- how is yours so small!?!
Find the "ordinary" or Euclidean distance between A and Z
Is this matrix orthogonal?
Reindex a vector
Basics: 'Find the eigenvalues of given matrix
Return the sequence element II
Regular polygon bounded by and bounding a circle
Mean number of letters per word (Easy)
The glass half full
The sliding puzzle: 15
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