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
Find state names that start with the letter N
Scoring for oriented dominoes
Flip the main diagonal of a matrix
Convert from Base 10 to base 5
Ratio between sum of primer numbers and non-prime numbers
Get the value 100
Check if is a square
Sum of a geometric series
Ratio between sum of primes and sum of factors
Approximate the inverse tangent by power series
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