Okay
questions 1-10: Passwords from pop culture
questions 11-15: hackers from pop culture
questions 16-20: elements from classic games. You have to find the proper names of the objects/chars/elements.
questions 21-30: colour theory.
questions 31-40: ciphers. All of them are types of substitution ciphers. If you figure out how to use machines to solve one of these, all of them should be easy.
questions 41-50: mixed bag.
PS, a lot of you seem to be getting stuck on q 29, look for contemporary, fashionable or trendy colours. Then dig into the history.