Check if sorted
First non-zero element in each column
Return the Fibonacci Sequence
Select every other element of a vector (★★)
Doubling elements in a vector (★★)
Mo money, mo math #2! (★★★)
Extract leading non-zero digit (★★★★★)
Generate a vector which contains a pyramid pattern (★★★★)
Magnitude of a vector (★★★)
Average of corner elements of a matrix (★★)
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