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.
Sum of first n terms of a harmonic progression
Create matrix of replicated elements
Who invented zero?
Compute Fibonacci Number
Make an N-dimensional Multiplication Table
Generalized N-Cards Problem
The Dark Side of the Die
Reverse the Words (not letters) of a String
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