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.
Find the palindrome
Project Euler: Problem 8, Find largest product in a large string of numbers
Back to basics 15 - classes
frame of the matrix
07 - Common functions and indexing 1
Triangle Numbers Below N
Number of 1s in the Binary Representation of a Number
English to Pig Latin Translator
Determine if a Given Number is a Triangle Number
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