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.
Project Euler: Problem 8, Find largest product in a large string of numbers
Back to basics 5 - Clipboard
Count up then down
Give the Shortest Path Through The Maze
Determine if a Given Number is a Triangle Number
Make an N-dimensional Multiplication Table
Roll the Dice!
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