General Knowledge Quiz for Saturday, 24 October 2020

A new general knowledge quiz is available every day. Try today's quiz or work through our archive of daily and themed quizzes.

Question 1: Which of these is a free social networking and blogging service created in 2006 by Jack Dorsey, that enabled users to send and read text-based posts of up to 140 characters displayed on a profile page and delivered to "followers"?