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.
given 3 sides, find area of this triangle
Reverse the elements of an array
Is it a number?
Find Out sum of principal diagonal element of given matrix
Linear system of equations
Highly divisible triangular number (inspired by Project Euler 12)
Divisible by 10
Rule of mixtures (composites) - lower and upper bounds
Mechanical Advantage of a Gear Train
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