This is a test for learning the process of creating a Cody problem.
The goal of this test problem will be to create an array, x, with 5 rows and 5 columns of nothing but 1's.
Find the numeric mean of the prime numbers in a matrix.
Sum of diagonal of a square matrix
Try 1.5.4: Celsius to Fahrenheit
03 - Matrix Variables 4
Area of a circle
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