Remove the air bubbles
Number of 1s in the Binary Representation of a Number
The Hitchhiker's Guide to MATLAB
Cell Counting: How Many Draws?
Find the Oldest Person in a Room
Equal temperament - musical notes and frequency
Under the sea: Snell's law & total internal reflection
Smallest n, for n! to have m trailing zero digits
Make a rainbow matrix (follow-up to checkerboard matrix)
Number of paths on a 3d grid
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