In 2017, homework is as easy as asking your digital voice assistant for the answers haha. i think siri, ok google, cortana, alexa, etc. will make homework obsolete. if you really want to challenge students to figure out how to do the work on their own, its going to have to be in the classrooms with their cell phones being banned.
https://www.emarketer.com/Article/Hey-Siri-Do-Homework/1015057