Return how many integer grid points there are inside a 3D sphere of radius r centred at (0,0,0) (including points on the edge).
Neither string operations nor interpolations are allowed!
Omit columns averages from a matrix
Back to basics 11 - Max Integer
Replace May with April
Set the array elements whose value is 13 to 0
Hexagonal Tiling Dots in a Circle
Edges of a n-dimensional Hypercube
Dots in a Circle
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