Really fun problem, but the test case is totally wrong. :-(
glad you liked the problem, but the test case is correct just obfuscated.
The sum of the numbers in the vector
Find a Pythagorean triple
Change the first and last diagonal element of the identity matrix to zero
Magic Concentric Circles
Is this number Munchhausen Narcissistic?
Create numeric palindromes and their square roots
remove nans fast
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