Rachel Riley suffered an embarrassing blunder when she didn't know the name of her own book when quizzed on the title by Jimmy Carr.The Countdown beauty appeared on the latest instalment of 8 Out Of 10 Cats Does Countdown when she made the slip-up as she got her introduction from the comedian.Rachel, 36, was happily perched on her chair as Jimmy, 49, got chatting to her about her children's book, which got its release in October last year.The educational tome - titled At Sixes and Sevens: How to Understand Numbers and Make Maths Easy - is aimed at teaching school-age children mathematics.However, Rachel stumbled over her own word challenge when she couldn't even name the book when asked.Jimmy started: "Last year rachel narrated a children's book aimed at making maths fun for kids.
Spoiler alert - it didn't."She said: "Have you asked all the kids?"Jimmy replied: "Have I asked the kids? I didn't want to wake them.
Read more on dailystar.co.uk