30 Comments For This Post

1. Cool Costumes Says:
   October 25th, 2007 at 1:38 pm

   I’m happy to know I’m not a nerd, the time I’m trying to decode that, I think one hour will already pass. (fortunately, the minutes are not indicated).

2. Jerad Kaliher Says:
   October 25th, 2007 at 5:58 pm

   I was laughing the moment that clock popped up in my RSS reader. Now I simply need to know where to get one!

3. Psychotic Apes Says:
   November 3rd, 2007 at 4:26 am

   lol well it’s 1 step above the binary clock.

4. Rainbow Says:
   November 3rd, 2007 at 6:33 am

   That sucks, the binary clock is way better.
   I solved them all at first glance, i’m sure you can too if you just try.

5. sunny Says:
   November 3rd, 2007 at 6:35 am

   It’s a funny clock and I want buy one for my friend on interracialmatch.com, and co you think it is neccesary? So how to get it?

6. Alex in T.O. Says:
   November 3rd, 2007 at 6:39 am

   That’s one inane clock.
   Just look at 3 o’clock-radical 9 +9-9!

7. Inder Says:
   November 3rd, 2007 at 7:21 am

   It looks sorta like Kakashi sensei’s new SHARINGAN!

   Now that… was a nerdy comment.

8. Kia Kroas Says:
   November 3rd, 2007 at 8:56 am

   It’s interesting I gotta say, but I sure would prefer a radian watch over that. Maybe I’m TOO nerdy…

9. « 9 said »« 9 said »« 9 Says:
   November 3rd, 2007 at 4:10 pm

   it’s kind of clever how the clock seems to use 3 9’s to express all the numbers- except for the number “1″. it looks like 1 o’clock is expressed as (9/9), or am i missing something because of the reflection? how about radical 9 times radical nine over nine?

10. TheCydonian Says:
    November 3rd, 2007 at 5:52 pm

    They fudged it a bit for the number 7…the equation actually equals 6.99999999999… but still a cool clock.

11. hirak99 Says:
    November 3rd, 2007 at 7:53 pm

    The clock has 1=(9/9)^9.

12. MathGeek? Says:
    November 4th, 2007 at 12:08 am

    6 + .9 repeating is equivalent to 6 + 1

13. MathGeek? Says:
    November 4th, 2007 at 12:09 am

    also, maybe 1 is (.9 repeating / 9) * 9 ? that would use 3 9s

14. Brian Says:
    November 4th, 2007 at 1:25 pm

    9 said:
    I think #1 is (9/9)^9, so it does use 3 9’s.

    TheCydonian:
    6.9999999… IS 7, for an infinite series of 9s, and that’s what 9-bar is.

15. Lotean Says:
    November 5th, 2007 at 1:01 am

    I found that the square root of 9! minus nine over nine is really 601.3952191 and whatever my calculator missed. It’s still a god idea though.

16. Lynx Says:
    November 6th, 2007 at 5:05 am

    It’s (sqrt(9))! - (9/9). So 3! which is 1 x 2 x 3 or 6, minus 9/9 or 1. So it does in fact come out to 5.

17. kothz Says:
    November 7th, 2007 at 6:28 am

    6.9, 6.99, 6.99…9999999, 6 + .9 repeating for an infinity of trailing 9s is *not* 7. It’s just infinitesimally close to 7, and it gets closer with each additional 9.

    You math geeks should be ashamed. Go stand in your corner.

18. Dylan Says:
    November 7th, 2007 at 9:14 am

    In mathematics, the recurring decimal 0.999… , which is also written as 0.\bar{9} , 0.\dot{9} or \ 0.(9), denotes a real number equal to 1. In other words, “0.999…” represents the same number as the symbol “1″.

19. nick Says:
    November 7th, 2007 at 4:56 pm

    0.999… is = 1 EXACTLY.

    kothz said »
    You math geeks should be ashamed. Go stand in your corner.

    maybe YOU should be ashamed for trying to correct maths geeks

20. Emilie Says:
    November 7th, 2007 at 6:37 pm

    wow…this is retarded

    root 9 is 3.
    root .9 is .3

    the rest is super simple.

    godd…it takes like 2 seconds to figure out!

21. What? Says:
    November 10th, 2007 at 7:20 am

    @Nick:
    “0.999… = 1″? NO! 1=1 and 0.999…=0.999…, but 1.000… isn’t equal to 0.999…. It’s like saying 5 is equal 3763782347!

22. Rick Says:
    November 11th, 2007 at 9:23 am

    9^(9-9) would have been nice for 1

23. Jeff Says:
    November 12th, 2007 at 4:42 am

    @What?:

    n=0.9 repeating
    10n=9.9 repeating
    10n-n=9
    9n=9
    n=1

24. Jeff Says:
    November 12th, 2007 at 4:46 am

    Also, there’s a more complex diagonalization and cardinality proofs to accomplish the same thing. They have the same end result as the above proof which is used to find the actual value of repeating decimals.

25. andy Says:
    November 14th, 2007 at 2:40 pm

    this clock has made me depressed because i was able to work them out easily!!

26. Zachary Voase Says:
    January 4th, 2008 at 11:55 pm

    Also, Emilie, just because root(9) is 3, root(.9) is NOT .3 : it’s (3/root(10)), which is some big decimal thingy. The reason being that .9 is 9/10, so root(x/y) = root(x)/root(y) = root(9)/root(10) = 3/root(10). et voila. it all works out (and 6.9 recurring IS equal to 7, it’s been proven above.)

27. Ginger Mayerson Says:
    January 5th, 2008 at 5:57 pm

    Looks like you can buy this and several other designs here

    http://www.cafepress.com/buy/math+clock/-/pd_10294612?CMP=KNC-F-ALL

28. James Says:
    January 6th, 2008 at 8:36 am

    ._.

    I want this clock. Where did they find it and how do I buy one?

29. john Says:
    January 6th, 2008 at 2:07 pm

    Some of them can tell the time. Some of them can count,but none of them know where to get the damn clock.

30. Prism Says:
    May 1st, 2008 at 3:27 pm

    Anyone know where I can get this, or a watch like this?

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