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.
Sums with Excluded Digits
Remove the polynomials that have positive real elements of their roots.
Find the maximum number of decimal places in a set of numbers
Sum of odd numbers in a matrix
Divisible by 13
Lights Out 13 - 5x5, three stages, x moves
Temperature Conversion Utility
Lights Out 10 - 5x5, with wrapping, 6 moves
Consecutive Equation Times (of the day)
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