Should include some test cases with negative numbers in the Test Suite. For example, several submissions would fail for x = [1, −1; −1, 1].
Right and wrong
Set the array elements whose value is 13 to 0
The Answer to Life, the Universe, and Everything
Matlab Basics - Absolute Value
Speed of car
Delete the column with all 0 in the TABLE
Calculate feeling temperature before climbing a mountain
Probability of red tulips (at both ends of a row)
Average of odd values
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