Create a cell array of strings containing the first n natural numbers. Slightly harder than it seems like it should be.
>> y = naturalnumbers(4)
'1' '2' '3' '4'
Determine if a Given Number is a Triangle Number
How long is the longest prime diagonal?
Replicate elements in vectors
Output any real number that is neither positive nor negative
Back to basics - mean of corner elements of a matrix
Split a string into chunks of specified length
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