Fixing Errors in Math Algorithms

[Jiggy9]

Hello,

I've identified several errors in the algorithms located in the "maths" folder, including the average, Fibonacci, Armstrong number, Hamming distance, Kynea numbers, LU decomposition, power of two, Sphenic number, and ugly numbers. I have already addressed and fixed these issues.

Could you please assign this issue to me under the Hecktoberfest 2023 initiative? I am ready to submit a pull request to apply the necessary fixes.

Thank you for your assistance!