in problem's explantation, Example in "17" part, it probably is: "3281 is divisible by 17.", not 2392 ?
@bainhome: thanks for catching that; it's been fixed.
Create logical matrix with a specific row and column sums
subtract central cross
Sum the numbers on the main diagonal
Sum of series IV
Approximation of Pi (vector inputs)
Fraction of a fraction of a ...
Mechanical Advantage of a Gear Train
Rule of mixtures (composites) - upper bound
Divisible by 10
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