Only those with the sharpest minds can solve this mind-boggling London Underground brainteaser in seconds - can you?. While we often put emphasis on physical exercise for our bodies, it is also important to keep our brains active - and there's no better way to give your brain a workout than a challenge. Brainteasers can boost your cognitive function, and improve your perception skills. You may already have a pretty good idea of how your mind works under pressure, but a fun quiz could well offer confirmation.

Solving this challenge will reveal if you are good at quick thinking and problem solving. Hint: You don't actually need to know anything about the London tube system to complete it. The quiz was shared on a service information board at a tube station recently, plus shared on Reddit - and thousands have been giving it a go. The brainteaser states: "Listen up! What letters, logically, is missing from the list? B, C, D, E, G, P, T...? One minute...Go!" Can you work it out?.

One individual guessed that the letters and names of Underground stations, writing: "Got it! This puzzle is likely based on London Underground station initials. The letters in the sequence represent the first letters of specific station names. In this case:. B: Bakerloo (or Baker Street) C: Camden Town D: Dollis Hill E: Euston G: Green Park P: Paddington T: Tottenham Court Road. The missing letter logically follows this sequence. Without further details, "H" (for Holloway Road, Hampstead, or Hammersmith) could be the next logical choice.".

However, another had a different theory. They suggested the letters listed (B, C, D, E, G, P, T) are the first letters of London Underground lines: Bakerloo, Central, District, Elizabeth, Great Northern (or the Gospel Oak to Barking Overground line), Piccadilly, Thameslink. The missing letter is R, for the Riverside line!". Despite these answers, others were adamant that the riddle is nothing to do with the London Underground. You can actually figure it out by looking at the letter themselves.

One pointed out: "V. I think it’s all the letters ending in an ee sound." Another agreed: "V - they all rhyme." And a third agreed: "V as it's rhyming phonetics.". We agree with this particular solution – V seems to be the correct answer. However, the Redditor later returned to the thread to apologise for all of the confusion. They said: "As someone that works at this station and knows the person who wrote it, I will let them know this has caused some arguments. We appreciate you all for this debate and look forward to the next one.".