QUIZ: can you answer our hardest questions
As the world puzzles over Cheryl's birthday, we take a look back at the hardest spelling, grammar, maths and logic questions we've published. Can you answer them?
The math quiz question stumping logic lovers worldwide
A head-scratching birth date riddle has gone viral on Facebook after a Singapore TV host suggested it was a question given to Grade 5 math students in his country.
Can YOU solve the maths problem Scottish schoolkids couldn't?
A complex question about a crocodile stalking its prey that baffled Scottish schoolchildren was far too challenging, examiners have admitted.
Think YOU can beat Carol Vorderman? Test your maths skills with The Maths Factor quiz
SHE'S a national treasure with a brain bigger than Britain (probably) but do you think you could beat Carol Vorderman in a maths quiz?
Quiz: Test your maths skills - would you pass a SATS test?
How good are your maths skills? New research shows that West Midland workers have some of the lowest maths skills in England. Take our test and pit your numerical wits against a primary school child.