I really don't see the point of that kind of problems where you can't use Matlab built-in functions.
Remove the air bubbles
First non-zero element in each column
Get the length of a given vector
Spot the First Occurrence of 5
Unique values without using UNIQUE function
Cody Computer Part 1 - Guess the system font used by uipanel
Find all the zeros of sinus , cosinus and tangent in a given interval
Matrix with different incremental runs
Angle between two vectors
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