Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20111015 03:04:13
Clock puzzlersI lay awake at night staring at the (digital) clock, and try to make equations as each minute passes by...I have all the 11 and 12 o`clock ones figured out, and most of the 10`s. Can you help with 10:26, 10:27, 10:28 and a few others I am sure you will come across as difficult. You can use any functions including roots and factorials (with the exception of the inequality sign!), however all the digits MUST be in order (as seen on the clock), and (except for square roots with their implied `2`)any root function MUST be warranted by the digit being already present. #2 20111015 03:18:32
Re: Clock puzzlershi Darby The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #3 20111015 03:18:49
Re: Clock puzzlersHi Darby; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #4 20111015 03:34:17
Re: Clock puzzlersI tried to quote bobbym in this reply, but evidently I don't know how to do that. Thank you for your quick answers.....do you sometimes want to just bang your head quietly on a desk? Some very rudimentary equations there.....I am a little sheepish. And to anonimnystefy, where I live the license plates have three letters and three numbers so I have an easier time making words from the letters....three numbers is often not a lot to work with mathematically... #5 20111015 03:35:11
Re: Clock puzzlersDo you allow integer functions? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #6 20111015 05:00:36
Re: Clock puzzlersI am not immediately familiar with those....can you give some examples? #7 20111015 05:10:35
Re: Clock puzzlersHi; That is the floor function there is also a ceiling function. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #8 20111015 05:16:42
Re: Clock puzzlers
I see what you mean. That would be stretching things just a bit, but in the absence of any other exact solutions I suppose it would be OK. As long as everything isn't quickly solved by this application (sort of like my "cheater" way on the 11 o'clock equations where almost every one of them can be written as 1 being equal to a power of one.....) #9 20111015 18:41:09
Re: Clock puzzlersThese are the only ones I have left to get: #10 20111015 19:15:58
Re: Clock puzzlers
1 = (0 X 2 X 7)! Signature line: I wish a had a more interesting signature line. #11 20111015 19:16:39
Re: Clock puzzlersHi Darby; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #12 20111016 05:38:07
Re: Clock puzzlers
I like this, because it actually solves all the rest as well. I went over all my equations to see if I had used zero as an exponent (another defined term) and I hadn't  and these fit the criteria so closely they work. Plus....I lack the mathematical depth to continue searching for some elusive root of some elusive factorial.... #13 20111016 05:50:11
Re: Clock puzzlers
10:38                                            Last edited by reconsideryouranswer (20111016 12:22:03) Signature line: I wish a had a more interesting signature line. #14 20111016 06:23:29
Re: Clock puzzlersHi;
Darby is satisfied, what is there left for me to do? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #15 20120807 07:12:33
Re: Clock puzzlersOk, I know this is now an OLD thread and someone is likely to chide me on that point and refer me to a more appropriate method of posting this query which, though, is essentially a followup to the above. My initial numbers were limited to those four digit numbers appearing on a digital clock  since then I decided that seeing as there were only 10,000 four digit combinations I would attempt to solve every single one of them. It has taken me months, and I am left with only four unsolved combinations. They are: #16 20120807 08:48:20
Re: Clock puzzlersHi Darby; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #17 20120817 21:44:29
Re: Clock puzzlersI just love playing with numbers . Basically series, its is so amazing that every number series has a solution to it. Just think carefully and it will be solved. 