Rachel Riley, 33, was put on the spot on the Channel 4 show, as she completed a maths equation on the board with the guidance of the The Chase star Paul Sinha, 49. The ITV quizmaster was tasked with getting to the sum of 593, with just six numbers available. The mathematician mused she had a couple of ways to get to the correct answer but admitted she was nervous because a “certain Chaser” was looking her way. When asked to breakdown the calculation, she said: “I’ve got a couple of ways but there is a certain Chaser here.
“Again he is glaring at me and I’m always scared of the Chasers, so…?”
Paul thankfully saw the funny side of Rachel’s joke as he chuckled before telling the small-screen star how to get to the maths answer.
Countdown host Nick Hewer, quipped: “Go on the Chaser?”
The Smiling Assassin got to work, and said: "24 times four is 100, take away one equates to 99.
“Eight take away two is six, so 99 times six is 594 subtract one is 593.”
Rachel replied: “He is a pro. Well done.”
Rachel Riley: Paul Sinha joined the show (Image: CHANNEL 4)