A lot of beautiful solutions.
Now, that's a neat and cool solution.
Very neat solution
He just wrote all the matrices...that's not neat, but everyone has the right to an opinion.
Another good one.
Who knows the last digit of pi?
Make a run-length companion vector
Fill a zeros matrix
Cell Counting: How Many Draws?
Given a 4x4 matrix, swap the two middle columns
Can you beat the lottery?
Find same numbers touching each other...
Find the next prime number
Do you like your boss?
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