If brain teasers are your idea of relaxation, put on your thinking caps for our 25 tricky IQ questions and answers! We promise to deliver you some mind-boggling questions! You’ve probably done a few ...

Add Yahoo as a preferred source to see more of our stories on Google. These quizzes seek to test your IQ by asking you various challenging questions about all kinds of subjects. Take each quiz to find ...

John, 12-years-old, is three times as old as his brother. How old will John be when he is twice as old as his brother? Two families go bowling. While they are bowling, they order a pizza for £12, six ...

Quora Questions are part of a partnership between Newsweek and Quora, through which we'll be posting relevant and interesting answers from Quora contributors throughout the week. Read more about the ...