Please don't use tangent and sine functions
Not a general solution. Passes only due to small number of cases in the Test Suite.
Back to basics 23 - Triangular matrix
Rotate a Matrix by 90 degrees
Is this triangle right-angled?
Square a Number
Add Me To Death (Sum sum sum)
Combine the digits to output numbers
Upper Matrix Mock
Modified run-length companion vector
Encode Me From The Past
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