It’s the Friday Puzzle…..


As ever, please do NOT post your answers, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

Can you use the same digit eight times with ‘+’ signs to produce a total of 1000?

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.


65 comments on “It’s the Friday Puzzle…..

  1. Simon Taylor says:

    Yes. Too simple.

  2. Alex says:

    Unbelievable, got it on first try!

  3. Yasha says:

    20 seconds to solve + 10 to verify.

  4. kroketje says:

    yep, very easy…

  5. Brian H says:

    Yes, got it with a bit of mental trial and error, about a minute overall

  6. Anonymous says:

    Got it! I’ll feel really smart now for the rest of the day 😀

  7. Bob O'H says:

    Yep. After spending a minute on how to get the last zero. Didn’t really help.

  8. David Mathew says:

    Wow, I got it first time! These usually take me ages (or I don’t get them at all). Either it’s an easier one or I’m finally tuning in!

  9. Anonymous says:

    Look on the bright side. No controversy here about the question being misworded.

  10. Navneeth says:

    I got the answer by misreading the question.

    Perhaps that was what you were after? A question with a rather simple answer to most people. But it’s actually a pschology test. 😀

  11. mike sugar says:

    Got it – about 1 min. Half logic, half trial & error.

  12. Sean Hurley says:

    Solved 3 seconds.

  13. Julie says:

    A maths question – and I actually got the answer – thanks to inspiration from a talk by maths genius Arthur Benjamin yesterday at The Festival of Magic in London

  14. neil says:

    Unlike everyone above, I normally get them but am stuck.
    I can however do 1000 with the same digit nine times and the + symbol. No other symbols.

  15. Shattenjager says:

    I spent 20 minutes trying to figure it out before I realized that my first guess had been right and I just somehow messed up the adding in checking myself.

  16. Luis Vicente says:

    Are we required to use a base 10 system?

    • safc4ever says:

      I don’t see any informatio/clues leading us towards another base system, and it works perfectly fine in decimal. Of course, “base 10” can be used to refer to any base unit as the base number itself is “10” in its own base! (eg in binary, “10” represents “two” but in hexadecimal, “10” is sixteen etc…)

    • Berhard says:

      “the same digit” not the same number…
      Could you please give your solutions for the bases, oct and hex on monday..

  17. Berhard says:

    There are only 10 types of people…

  18. Anonymous says:

    got it!

  19. ladymac says:

    The only times recently,past month maybe-don’t like counting-I got it so quickly I could say quickly(not brag,hate braggarts) like some, something to do with lions 1st time- it was not a math puzzle, but others gave away answers so they were forbidden until you started math problems again. Other times ,been too tired. One actually bragged about his little boy getting one right in third of a second-bit much,must be some watch-no-don’t write me if watches made that way exist;they must,please-don’t care! Admire those who get answers quickly and refrain from statements like[actual statement] “got it before I finished reading question”.Even if true ,I’d never trumpet that-bad form to me. Please no angry answers as I’m ill & maybe too testy-sorry, everyone.

  20. ladymac says:

    Had to ask,for husband too,are you Gabriel Knight fan?-not my business, couldn’t resist-good wishes.

  21. Anonymous says:

    This was a 5 minute one 😉

  22. Anonymous says:

    I can do it 2 ways using 2 different digits!

  23. Duncan says:

    Got it after a couple of minutes, a bit of trial and error, should have worked out quicker really.

  24. Anonymous says:

    I can’t believe people are already giving the answer away in the comments again. Why can’t people grow up?

  25. Hazel says:

    Got it in about 3 minutes, with some trial and error and a crayon!

  26. Julia says:

    I remember the answer from last time you asked this question.

  27. Rachel says:

    Got it, wicked easy.

  28. Lazy T says:

    It took a couple of mins to get the satisfaction of a puzzle solved, and I can also (lamely)
    get 1000 in 13 digits with no symbols

  29. Ian Reeve says:

    If I hadn’t been able to get it, would ‘no’ have been accepted as a correct answer?

    • Anders says:

      oops, that is exactly what you said, I’m not sure what I was thinking but for some reason I misread your comment. Sorry

  30. peter says:

    For a thicko like me, I’m amazed it was so easy 🙂

  31. Is using base 126 numbers cheating?

  32. The Masked Twit says:

    Can get it without using the + sign

  33. MaciejK says:

    I can use one digit nine times with “+” signs to produce a total of 1000.

  34. Mervulon says:

    “Same digit” implies a singular digit used repeatedly eight times – “10” is two digits.

  35. Mervulon says:

    Interesting that in using quotation marks around a number, such as “10” above, this application presents the second quotes mark as the symbol for “inches.”

  36. Anonymous says:

    Wrote a script in VBA to solve it for me. Pretty straight forward

    • Anders says:

      If you wrote a script in VBA to solve it, I’m going to go out on a limb and guess that you haven’t actually solved it

  37. Sari1967 says:

    My answer is yes

  38. Ian says:

    Oh, that’s a nice sort of straightforward but clever one, Richard, thanks for that: sort of a gentle workout for the brain. Took about a minute or so to get it and double-check it. Thanks for that one 🙂

  39. Eddie says:

    Got it at last. Nice one.

  40. Anders says:

    Hmmm, I can think of two relatively independent solutions (but with the same basic idea)

    I am not sure how long it took me, but following the normal standard here, I’ll just say it took me 2 seconds

  41. Jared says:

    2 mins to solve. pretty easy

  42. Peter Leeson says:

    Solved in a couple minutes (including verification) in both decimal and binary systems

  43. Anonymous says:

    Took me ages, because I didn’t read the puzzle carefully and tried to solve it with 10 digits. When I reread and used 8 digits, it was a breeze 🙂

  44. Anonymous says:

    Seems suspiciously simple, I wonder if tehre is some kind of catch. If not i solved it on the first guess.

  45. Donald says:

    When I was forced to go to church, I used to do stuff like that for many different challenges – 4 numbers, one through 100, five numbers etc.

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