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]
Project Euler: Problem 6, Natural numbers, squares and sums.
Sophie Germain prime
Find nearest prime number less than input number
length of a vector
Say type of roots in quadratic equation
Ratio between sum of primes and sum of factors
Get the mean digit
Ratio between sum of primer numbers and non-prime numbers
Get the value 100
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