Make fMat be a 5x3 matrix of random integers with values from -3 to 3
(Hint: use randi)
Test for randomness could be tightened (cf. Solution 1490988).
Make a checkerboard matrix
Most nonzero elements in row
Sums with Excluded Digits
Back to basics 13 - Input variables
Length of the hypotenuse
02 - Vector Variables 3
07 - Common functions and indexing 1
04 - Scalar Equations 2
02 - Vector Variables 1
02 - Vector Variables 5
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