make all the elements in given x zero.
Simple but fun
I'm not sure this would work if there is a 0 in x...
Return the largest number that is adjacent to a zero
All your base are belong to us
Back to basics 8 - Matrix Diagonals
Basics: 'Find the eigenvalues of given matrix
Replace all odd numbers with NaN
Make an identity matrix whose diagonal elements are 1:n
Where is the number that you want to find?
Sum the rows
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