You're *very* close with this one. Remember that r is input as a double, not a string.
Knight's Tour Checker
Numbers with prime factors 2, 3 and 5.
The Top 5 Primes
Calculate a Damped Sinusoid
Return elements unique to either input
High Precision Square Root (Inspired by Project Euler 80)
Some Assembly Required
Crunch that matrix!
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