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]
Multiply 2 numbers
matrix of natural number
Given a 4x4 matrix, swap the two middle columns
Integer or Float?
Get the mean digit
Get the value 100
Approximate the inverse tangent by power series
Ratio between sum of primes and sum of factors
Say type of roots in quadratic equation
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