Nice expression for the usage test. Maybe one can add function "dec2base", cause the return type is a String.
The problem description should mention that dec2base isn't allowed either.
This will fail to detect certain palindromes which contain zero e.g. 10101 however the test suite doesn't (yet) contain any such.
There's something strange with the Cody test suites today...
Back to basics 3 - Temp Directory
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
frame of the matrix
Side of an equilateral triangle
Read a Soroban Abacus
Make an N-dimensional Multiplication Table
Triangle Numbers Below N
Test if two numbers have the same digits
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