Rachel Riley is among one of the many contributors who has teamed up with social media giant TikTok for a new initiative called #LearnOnTikTok. The 34-year-old, who is known for being a maths whizz on Countdown, has joined the likes of English Heritage and Our Girl actor Sean Sagar to produce educational content for the platform.READ: Strictly's Nadiya Bychkova treated to the ultimate surprise by her fiancé"This should be fun," tweeted the former Strictly Come Dancing contestant.