When in a Space or Group you can find the unanswered questions easily by using the filters under content. Here's how:
1. Click on content in the GeoNet group navigation.
2. Narrow the content to Questions only and set your filter parameters to Open questions and Sort by created date: newest first. This will narrow down the content to only unanswered questions that were recently created.
You can sort through other filters or search by keywords as well.