The title and description of this problem have been cleaned up. Also, its test suite has been expanded and improved.
pressure to dB?
Create a square matrix of multiples
Multiply a column by a row
Max index of 3D array
Remove the positive integers.
Find the sides of an isosceles triangle when given its area and height from its base to apex
Find product of eigenvalues of n*n magic matrix.
Convert array of decimal numbers into hexadecimal numbers array.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Count given word x in text.
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