Starting from 440Hz note (musical note A above middle C), create 13 notes, using twelve-tone equal temperament, in Herz units. https://en.wikipedia.org/wiki/Equal_temperament
Your output will be like [440, ... , 880] all rounded to integer.
Find all elements less than 0 or greater than 10 and replace them with NaN
Inner product of two vectors
Angle between two vectors
Sum of series III
Number of paths on a 3d grid
Under the sea: Snell's law & total internal reflection
The number of trailing zero digit of a factorial
Fractal: area and perimeter of Koch snowflake
Make a rainbow matrix (follow-up to checkerboard matrix)
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