In the main site, there is a bar on the right named Hot Meta Posts containing the good questions on the meta site. But there is no such bar showing the trending best questions on the main site. There maybe the Hot Questions Bar but they show good questions from all the 149 communities, which sometimes don't even contain more than 1 or 2 questions from MathsSE. There are however, many questions on the main site which get a lot of attention and lots of upvotes and brilliant answers almost everyday.
To find these questions, one has to scroll through 3 to 6 pages of 50 questions each to find out which questions got attention and which questions got good answers. This is very laborious.
But only 10k+ rep users have access to the Moderators Tools Option from where they can note down what are the highly voted, commented and edited questions and answers. Of course, these trusted users require the information to help the mods properly run the site.
Still there should be a bar on the right which should be visible to all the users in general so that they can also contribute to the questions and get helped by the answers.