Given an odd number n, write a function that creates a matrix y with dimension nxn alternating 1's and 0's, and starting with 1 in the center of the matrix. For example, for n=3 one should get:
y = [0 0 0 ; 0 1 0; 0 0 0]
Encode Roman Numerals
Project Euler: Problem 6, Natural numbers, squares and sums.
2 b | ~ 2 b
Reindex a vector
Ratio between sum of primes and sum of factors
Check if is a square
Get the value 100
Sum of a geometric series
Get the mean digit
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