Problem 3 solved:)
Added execution time in 2.py
Code simplified to one line:)
Used pow method in math in 16.py.
Return the last 10 digits only in 48.py
More elaboration on 20.py task
Removed the repetitive str() list cast in 48.py
Modeified 7.py to a more quicker oneliner
Reduced the limit to fasten execution time in 7.py
More elaborative output in 7.py
More elaborative output in 7.py
Removed the len() attr in 7.py