{ #someting_new }Post coding challenge here

Question

the challenge is not about questions and answers it is about giving challenge to code you can think and give your coding challenge. others can solve that challenge and post it here . I will personally try to solve challenges on python
    Example:-

https://www.sololearn.com/Discuss/959489/challenge-crossword-solver

https://www.sololearn.com/Discuss/971486/challenge-new-year-code

Answer 1

Challenge:
Find Fibonacci numbers

Must include:
Explanation of the code
Link to this thread
Must work properly