Find common elements in matrix rows
Numbers with prime factors 2, 3 and 5.
Return the first and last characters of a character array
Try 1.5.4: Celsius to Fahrenheit
Divisible by 5
Equal temperament - musical notes and frequency
Fractal: area and perimeter of Koch snowflake
Number of even divisors of a given number
The number of trailing zero digit of a factorial
Under the sea: Snell's law & total internal reflection
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