cool idea! very eye-opening
Second thoughts: I think in the new version of MATLAB, the initial value of ans should be set for empty matrix, not empty string.
First non-zero element in each column
Make a random, non-repeating vector.
Concatenate two strings
Area of a circle
Find the area of a triangle
Basic commands - rounding
Basics - not so easy division
Basic commands - Least common multiple
How many bottles can you drink?
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