test 8 is not a symmetric matrix, is it a projector matrix?
Sorry about that one. I've removed that test case. I don't know how long it will take for the re-scoring to propagate, though.
Select every other element of a vector
Find the longest sequence of 1's in a binary sequence.
Convert a vector into a number
Speed of car
Divisible by 7
Divisible by 5
Lights Out 7 - 5x5, x moves
Divisible by n, Composite Divisors
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