Given a number, return the number of closed 'circles' in the base 10 numerical representation.
Note: the number 4 has no circles
8819 -> 5
Interpolating on a string (the ASCII values) is an interesting idea even though the long interpolation string could be reduced by subtracting '0', but at the expense of a "longer" solution.
What is the next step in Conway's Life?
Distance walked 1D
Number of 1s in the Binary Representation of a Number
Return unique values without sorting
06 - Matrix Equations 3
Recurring Cycle Length (Inspired by Project Euler Problem 26)
Specific Element Count
Generate N equally spaced intervals between -L and L
Read a Soroban Abacus
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