leave "by" strings alone,nice touch!
Return the 3n+1 sequence for n
Find nearest prime number less than input number
Find Index of maximum Value and maximum Value of a vector
sum of non-primes
Basic arrays operations.
Hackathon - String version
Give me Hamming on five, hold the mayo
Singularity v5 (with apologies to the true hack masters)
Exponents in Factorials
What digit is it?
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