I'm getting different answers.. can u give a more clear explanation?
Return the 3n+1 sequence for n
Matrix indexing with two vectors of indices
Alternately upper-lower case
Find indices of diagonal elements
Fractal: area and perimeter of Koch snowflake
The number of trailing zero digit of a factorial
Under the sea: Snell's law & total internal reflection
Number of even divisors of a given number
The last non-zero digit of a factorial
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