Given the variable x as your input, multiply it by three and put the result in y.
Duplicate of Problem 2980.
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Find the largest value in the 3D matrix
Basics: 'Find the eigenvalues of given matrix
Test if two numbers have the same digits
sum of non-primes
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