Better than all previous non-cheat solutions :-)
The function 'unique' should probably also be prohibited.
Strictly following the problem statement, this should pass?
This also does the trick :)
Return a list sorted by number of occurrences
Check if sorted
Add two numbers
Sum the numbers on the main diagonal
Is this triangle right-angled?
Capitilize the first letter of every word in a string
Find the average of a random sequance
Separate even from odd numbers in a vector - with a loop
Triangle of numbers
Remove the first, third and fifth rows of a matrix
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