I like the way James present a problem: educatiive and interesting.
Find common elements in matrix rows
Alphabetize by last name
Doubling elements in a vector
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
Community Problem 500!
A (wrong) place for everything, and everything in its (wrong) place
It's going down. We're finding simbers!
Sums of Distinct Powers
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