Interesting problem but tests are too tricky.
I am not sure that a list of equal numbers qualifies as a series. Would it be a geometric or an arithmetic series?
Getting the indices from a vector
Replace multiples of 5 with NaN
Is it an Armstrong number?
03 - Matrix Variables 2
Narcissistic number ?
Integer sequence - 2 : Kolakoski sequence
Beauty of Parentheses
remove single elements
weekday and month
Integer Sequence - II : New Fibonacci
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