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!
Find the two-word state names
Is it an Armstrong number?
Is this triangle right-angled?
Edges of a n-dimensional Hypercube
Shifted Hexagonal Tiling Dots in a Circle
Dots in a Circle
Triangular Tiling Dots in a Circle
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