Numbers with prime factors 2, 3 and 5.
Is A the inverse of B?
middleAsColumn: Return all but first and last element as a column vector
Create logical matrix with a specific row and column sums
Hexagonal numbers on a spiral matrix
Characterize the final state of the digit inventory sequence
Count trailing zeros in a primorial
Test approximations of the prime counting function
Pass the cards in Fitch Cheney's five-card trick
Construct a continued fraction for a square root
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