In the place of "Find the sum of all products whose...", I would say: "Find the number of all products whose..." ;-)
Why  instead of 0?
Since I have kludged a solution together, can I have a hint?
this solution works on my comupter
I see the first test command line is corrupted
:( :( :(
I've fixed that first line in the test suite. Try it again.
Given an unsigned integer x, find the largest y by rearranging the bits in x
Return unique values without sorting
middleAsColumn: Return all but first and last element as a column vector
Reverse the elements of an array
Longest Collatz Sequence
Mirror, mirror on the wall, who is fairest of them all?
Pandigital number n°1 (Inspired by Project Euler 32)
Permute diagonal and antidiagonal
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