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

    1. Since Simon already gave the answer to Richards question you can ignore mine as well.
      The only correct answer to the question is: …. yes we can!

  1. 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!

  2. 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. 😀

  3. 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

  4. 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.

    1. I had assumed no other symbols too, but like you I used configurations that need no other symbols and I also got 1000 with nine digits.

  5. 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.

    1. 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…)

    2. @safc4ever…
      “the same digit” not the same number…
      Could you please give your solutions for the bases, oct and hex on monday..
      Sincerely…

  6. 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.

  7. 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

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

  8. 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.”

    1. 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

  9. 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 🙂

  10. 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

  11. 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 🙂

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