Math problems, C++ and C# programming help

Well I tried to find a normal page where I could post this but apparently the only thing that is allowed are blogs.So here it goes - I am preparing for a major internship interview and wanted to work on all the problems I could get my hands on.So If any of you guys have any questions related to programming ,cybersecurity , maths or coding and algorithms in general, just post them in the comments and I will write actual working code or answers If i know them.

PS-I am mostly looking for problems on cybersecurity,database,applicaton development ,algorithms and calculus and puzzles. Hopefully I will be able to help some of you out with the homework Haha