The problem description is broken(?) and you have mentioned the code in the test suite (you might want to remove that)
The test suite has had the "solution" code removed. The description was also cleaned up. (If it's not loading, simply reload the page.) I'm not sure how much these fixes help, though...
Find the alphabetic word product
Scoring for oriented dominoes
07 - Common functions and indexing 6
Side of an equilateral triangle
is the number happy?
provide the numerical answer to these number questions...
remove nans fast
Tony's trick for duplicating an mx1 vector n times
Strange Number Algorithms
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