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.
Who knows the last digit of pi?
Getting the row and column location from a matrix
Simple equation: Annual salary
Add two numbers
Max of a Vector
Test if two numbers have the same digits
Make an N-dimensional Multiplication Table
THE CALCULATOR OF LOVE
Great Circle Distance
Television Screen Dimensions
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