Everyone, I've modified the test suite such that common cheats won't work; i.e., regexp/rep, interp1/2/3, num2str, str2num, etc. are disallowed! General numerical solutions, however, are most welcome.
Find relatively common elements in matrix rows
Tic Tac Toe FTW
Test for balanced parentheses
Project Euler: Problem 10, Sum of Primes
Shifted Hexagonal Tiling Dots in a Circle
Triangular Tiling Dots in a Circle
Edges of a n-dimensional Hypercube
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