The Tough Quiz does what it says on the tin. No-one knows how many questions it has, no-one knows if it’s ever completed. No easy shortcuts here. There is no need for text input; just multiple-choice answers. Questions vary from general knowledge challenges to logical brain-benders. By the end of it, you will be mentally exhausted, but even if you fail, it's guaranteed that you’ll come back for more.

If you think your mind has boundless abilities, or know a big-headed friend who you think needs to be shown what’s what, then The Tough Quiz is the perfect app. Download it today here. Please remember that spending 24 hours a day trying to get to question 10 is probably not a clever idea.

Buying The Tough Quiz also entitles you to updates and additions to the questions over time.

Good luck, and enjoy the quiz!