This should be quite straightforward but at 2a.m. my brains are not working 100%. ;)
I has exactly the same idea!!
but on the second line I used directly the logical indexing... ;-)
Prime factor digits
Knight's Tour Checker
Rotate and display numbered tile
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Order of things - 2
Wayfinding 2 - traversing
Order of things - 4
Wayfinding 5 - Travel contour
Order of things - 1
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