You've got a pretty good ELO, and are brave for publishing it. How often do you play?
Return the 3n+1 sequence for n
Getting logical indexes
Narcissistic number ?
Divisible by 5
Permute diagonal and antidiagonal
Mysterious digits operation (easy)
Magic is simple (for beginners)
Decrypt the cypher using XOR encryption (for beginners)
Negation and new variables
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