Test for randomness could be tightened (cf. Solution 1490988).
Get the area codes from a list of phone numbers
Number of Circles in a Number
Create a two dimensional zero matrix
Calculate square and cube of number
07 - Common functions and indexing 5
04 - Scalar Equations 3
06 - Matrix Equations 2
02 - Vector Variables 1
03 - Matrix Variables 3
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