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.
Sort a list of complex numbers based on far they are from the origin.
Back to basics 13 - Input variables
Solve the set of simultaneous linear equations
Stuff the Board
Check to see if a Sudoku Puzzle is Solved
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
Great Circle Distance
Recurring Cycle Length (Inspired by Project Euler Problem 26)
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