Right and wrong
Project Euler: Problem 6, Natural numbers, squares and sums.
Back to basics - mean of corner elements of a matrix
Concatenate two strings
Find the dimensions of a matrix
give-nth-decimal-place-of-pi up to 100 digits
Given a 4x4 matrix, swap the two middle columns
Equal to their cube
Given area find sides
Basics: 'Find the eigenvalues of given matrix
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