This Fiendish Numerical Puzzle Has Left Swathes of Social Media Users Scratching Their Heads - Can You Solve It?

The image above shows a series of basic calculations you probably learnt in nursery. You've got to work out the last sum (10 X 10) from the multi-choice

This viral maths puzzle will leave you scratching your head... but can you solve it in 10 seconds?

While many brainteasers rely on having laser-sharp vision, the general knowledge of a quiz master, or the literary skills of an English teacher - this one is a little different.

In fact, you'll need to be a mathematical genius to solve this while racing against the clock. After going viral online, this numerical puzzle has left swathes of social media users scratching their heads.

So, do you think you're a big enough boffin to complete the cryptic task?

Remember, games like this aren't just a silly way to entertain the kids or occupy your morning commute. Researchers say they could also help improve our attention span and better our concentration levels by positively impacting the central nervous system.

The image above shows a series of basic calculations you probably learnt in nursery. You've got to work out the last sum (10 X 10) from the multi-choice answers of 100 or 200 - and need to lock in your answer in just 10 seconds or less.

You're not getting any help from us on this one, but if you need to take more time that's fine. Most people give up on this puzzle after realising none of the answers make much sense. But, can you crack it?

Scroll down to the bottom of the article to find the answer.

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If numbers are not your strong point, don't worry. Below are 10 questions you'd expect to see at your local pub quiz. However, each one is craftily designed to trick you up, so don't get too cocky. You only have three seconds to spend on each Q before moving onto the next and need to score at least eight out of 10 to be crowned a proper genius.

We're giving away no clues, but it's helpful to read the sentence at least twice. Ready? Let's go - and once you're done, you can check your answers here.

ANSWER: 200. This is because each sum in the puzzle is doubled. For example, 3 X 3 = 9 and 9 X 2 = 18.

In the mood for another mental workout? Check out our whole collection of challenging brainteasers, riddles, and puzzles here.

Or, learn more about your hidden personality traits with these mind-boggling optical illusions.

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