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Please do NOT post your answer, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

A non-mathematical one this week.  What four-letter word is the same when it is read forwards, backwards and upside down?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

56 comments

    1. That case, you’ve not solved the puzzle as set.
      I think the solution in English is unique, though one possible solution is an Italian brand of cycling clothing.

    2. Lord Manley,
      Would you be kind enough to share your two words with us now?

    1. Is it hard to prevent yourself reading the comments before attempting to solve it? I find it quite easy, but then I’m not mentally handicapped.

    2. I agree with you anonymous
      There are far too many people who post on these threads who are far too quick to take offence
      Like you, I suspect they may have mental ( and self esteem) issues

  1. A couple of minutes to get this. Though can’t (yet?) find one that doesn’t rely on using capitals only.

    Shame about the giveaway comments.

  2. About 30 seconds for a non-native speaker to find 2 such words, but with eyes on the keyboard and using capitals. Two more, you say? I would have to check the dictionary and that would not be a clean and fair solution.

  3. Fairly easy – the upside down requirement severely limits the number of candidate letters, while the palindromic requirement further limits the number of valid combinations of letters. I reached the answer on the third combination I tried.

    I wonder how many valid words there could be with differing numbers of letters?

  4. Figured out two different ones that work in capital letters – one if you consider “upside-down” to mean mirrored, another if you consider it to mean “rotated 180 degrees.”

  5. Ages, are the comments used for Richard’s experiments? Does it work in comic sans? Should you read the comments before solving the puzzle and then be annoyed that the hints weren’t good enough? #love these puzzles.

  6. took me 15 minutes — wrote a little (python) program and I can confirm there is only one word in english. I did it wrong in the manual attempt and my program showed no result till I realised I was missing a bit…

    There are anyway only 20 possible words, if I am right 😉

  7. When it says “when it is read … upside down” does it mean flipped around the mid axis, in which case letters like H and I are okay. Does it mean viewed in a mirror at the top or bottom of the word, in which letters like K are also okay? Does it mean rotated 180 degrees, in which case S is also okay?

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