Write a function that gives the mean digit (round towards nearest integer) of an input and positive number. For example:
x = 264 --> y = 4
x = 128 --> y = 4
Test Suite problem #4 has an incorrect value.
Test suite #4 is incorrect
Volume of this donut
Flip the main diagonal of a matrix
Create a matrix X, where each column is a shifted copy of the vector v
Output any real number that is neither positive nor negative
Who invented zero?
Check if is a square
Alternating 1´s and 0´s in a matrix
Say type of roots in quadratic equation
Approximate the inverse tangent by power series
Alternate list of elements
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