Just 15 percent of people can get this 'fiendish' One Percent Club brainteaser right

Most people will fail this tricky due to one easy mistake.

are a great and convenient way to keep our minds active, and have even been shown to have a positive impact on our attention span and concentration levels. They're also a life-saver when your little ones won't shut up about being bored but refuse to go out and play in the pouring rain. Featured on the Australian version of the 1 Percent Club, a popular TV quiz show, this tricky question knocked five out out of 13 players out of the competition. But, are you smart enough to survive another round?

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"Frodo has forgotten his hotel room number. All he remembers it that it had at least one 'nine'," the riddles reads. "If the hotel has room numbered from one to 100, how many might be Frodo's?" We're not giving away any clues for this one, but if you need a little more time to work out your calculations, feel free to pause the video. Resume playing or scroll down to the bottom of the article to reveal the answer.

If that brainteaser was a breeze for you, it's time to take things up a notch with this cryptic puzzle only those with the sharpest minds can solve. Created by the (GCHQ) back in 2020, this fiendish task will prove whether you have what it takes to become a spy and protect the nation from evil. So, put your 007 thinking caps on and find the hidden word amongst the following. There's no time-limit for this one so you can go at your own pace, but remember - the is relying on you. Click here to for when you inevitably admit defeat.

• Madison
• Saturn
• Do
• Nitrogen
• Exodus

ANSWER: 19. This is because his room number could be 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99.

Hundreds of baffled viewers flocked to the comments section, with many claiming they got the right and that it was 'easy'. However, the majority were quick to admit they made an error when calculating the number of rooms. "Not me confidently including 90 and 99 but forgetting all the numbers between," confessed one person. Another commented: "My mind immediately went to 11, I don't know why lol. WRONG." A third added: "I forgot 99 was just one room," while a fourth penned: "I was off by one, I forgot 90 for some reason." Many argued the answer should be 18 and that room number 'nine' should be ruled out as the question implies Frodo is staying in a room with double digits. Up for yet another challenge? Check out our entire collection of here. Or, learn more about the hidden parts of your personality by trying a .

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