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.
Check to see if a Sudoku Puzzle is Solved
Spot the outlier
select the primes of a vector
Side of an equilateral triangle
Area of a triangle
Guess the Coefficients!
Clock Hand Angle 1
Return the 'Size' of a String of Code
Next Lower Power of B
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