Covering some basic topics I haven't seen elsewhere on Cody.
Return the class of the input variable.
Remove all the words that end with "ain"
The Goldbach Conjecture
Back to basics 19 - character types
Narcissistic number ?
Concatenate two strings
Better bullseye matrix
Back to basics 6 - Column Vector
Back to basics 7 - Equal NaNs
Back to basics 17 - white space
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