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.
Tell me the slope
Read a Soroban Abacus
Back to basics 11 - Max Integer
Find Index of maximum Value and maximum Value of a vector
Count decimal digits of a number
Check to see if a Sudoku Puzzle is Solved
Return the Nth Output from an Input Command
Parse me a Lisp
Generalized N-Cards Problem
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