Rachel Riley

British mathematician and television presenter

London, England

About Rachel

Rachel Riley is a British mathematician and television presenter. She is best known for her appearances on the BBC quiz show Countdown. Riley has also worked as a mathematician and has written several books on mathematics.

Associated Podcasts

James O'Brien's Mystery Hour

Host

The Unexplained With Howard Hughes

Guest

Not Skinny But Not Fat

Host

Reuters World News

Guest

Connect

Recent Appearances

Scott Mills' BBC Exit: A Storm of Allegations

Entertainment & Celebrity News Today | 2 Min News | The Daily News Now!•Apr 2, 2026•1:10•guest

The decision about Scott Mills has been taken with unusual speed

NewsK365•Mar 31, 2026•5:15•guest

Rachel Riley

About Rachel

Associated Podcasts

James O'Brien's Mystery Hour

The Unexplained With Howard Hughes

Not Skinny But Not Fat

Reuters World News

Connect

Recent Appearances

Scott Mills' BBC Exit: A Storm of Allegations

The decision about Scott Mills has been taken with unusual speed

World of Secrets

NewsK365

Entertainment & Celebrity News Today | 2 Min News | The Daily News Now!

UK News Today | 2 Min News | The Daily News Now!

Adelaide News Today | 2 Min News | The Daily News Now!

Key Topics

UK Sonographers Shortage Causes Ultrasound Scan Delays

ABC Fifty-Fifty Quiz: Trivia Without the Stress

Al Fayed, Predator at Harrods: 5. Silenced no more

The coronation the world is and isn’t celebrating

Bachelorette, Paradise, & Stagecoach w/ Blake Horstmann

Why does your skin go wrinkly in the bath?

Can we say that on the radio?

Edition 18