We all know how important it is to keep our minds healthy, as boosting cognitive function is just as vital to our overall health as regularly keeping our bodies active. And while brain teasers that ask you to find hidden objects or complete complex puzzles can challenge you in different ways, there's nothing quite like a good old-fashioned general knowledge quiz.
So why not try your hand at the 15 questions prepared below? There's no time limit on working them out, but you'll be able to boast to your friends if you get them all right AND do it in record time, so why not see how quickly you can solve each one? We'll give you the answers at the end, so you'll know your score.
According to This Quiz, who prepared the questions, they're supposed to be designed for "smart people", so while it isn't an IQ test by any means, you can at least know you've got a good head on your shoulders if you can get most of the questions correct on the first try. And what's more, you even have the chance to completely guess the answers as they're all multiple choice - so even if you don't know, at least give it a go.
Who produces the biggest eggs? (A) The whale shark, or (B) the ostrich
The Gunpowder conspiracy was against the king: (A) James I, or (B) Charles I
Staring at this optical illusion for 2 minutes 'makes world look very different'
Who was the first president of Cuba? (A) Tomás Estrada Palma, or (B) José Miguel Gómez
Vulcan Island belongs to: (A) Italy, or (B) Portugal
William Wallace was a: (A) Scottish monarch, or (B) Scottish knight
The largest coral reef is located in: (A) Australia, or (B) Venezuela
Guy Fawkes Night is celebrated on: (A) December 5th, or (B) November 5th
Maximilian I of Mexico was a native of: (A) Mexico, (B) United Kingdom, or (C) Austria
The most decorated Olympic athlete of all time is: (A) Usain Bolt, or (B) Michael Phelps
What is the capital of Finland? (A) Helsinki, (B) Roseau, or (C) Oslo
An animal with a cartilaginous skeleton is: (A) Stingray, (B) Chimaera, or (C) Both
The Tragic Decade took place in: (A) Mexico, or (B) Spain
Only people with eagle eyes can spot the wolf among racoons in just five seconds
The Narwal is also known as: (A) Marine Unicorn, or (B) Frogfish
Pride and Prejudice was written by: (A) Jane Austen, or (B) Charlotte Bronte
Have you worked out all of the answers yet? Don't worry if you haven't, you can keep working on it for as long as you need. However, we're about to give you all the answers so don't scroll any further if you don't want to know just yet!
How many did you get right? Let us know in the comments. And if you want to test your brain power with even more quizzes, why not try this tricky school maths question about trains, which left many adults stumped when it went viral online, or this quiz question about coffee which proved so tricky that even baristas can't solve it? Or you can try this tricky UK quiz show question that only 1% of people are able to solve.