Generate the proper factors of input integer x and return them in ascending order. For more information on proper factors, refer to http://mathworld.wolfram.com/ProperFactor.html.
setdiff returns 1x0 array instead of 0x0 for the first test or for any similar case, anyone know why?
Are you in or are you out?
How long is the longest prime diagonal?
subtract central cross
convert matrix to single column
Is this triangle right-angled?
Number of 1s in the Binary Representation of a Number
Return the first and last character of a string
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