This problem has been enhanced and now has additional test cases.
Find the numeric mean of the prime numbers in a matrix.
Project Euler: Problem 9, Pythagorean numbers
Implement simple rotation cypher
Draw a 'Z'.
Persistence will help you solve almost any problem.
nanoseconds passed today
A little bit of luck needed
calculate the day of the year from a date string.
How do you make seven even?
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