Possible answers to code challenge found on: https://medium.com/coderbyte/the-5-hardest-code-challenges-for-beginners-e410da4474b 1. Question Marks: Requires looping through a string and checking if certain conditions are met. 2. Vowel Square: Requires finding a 2x2 square of vowels in a larger matrix. 3. Scale Balancing: Requires looping through an array of weights to determine if a scale can be perfectly balanced. 4. Correct Path: Requires traversing through a partially finished path in an NxN matrix and finishing the path. 5. Closest Enemy II: Requires checking the distance between certain points in a NxM matrix.