solutions are rounded in a somewhat arbitrary fashion...
Your value of pi is wrong.
The problem should specify that the used value for pi is 3.1416 (since this is not its true value), and that we need to use floor with precision of 4 decimal places.
kmph to mps
Duplicate a character
Matrix multiplication across rows
Compare two input matrices
Square the input
Moore-Penrose pseudoinverse of matrix
Permutations of input vector
Calculate Simple Intrest for given data
Xor of matrix
Output a vector which is table of 9
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