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Happy 3 4 5 6 7 8!
- Thread starter Doctor Q
- Start date
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feakbeak said:
Actually isn't that (n+1)^2?!
unless you count 1^2 = 1 as your first one?!eg when n=4, it would be 1 + 3 + 5 +7 + 9 = 25 (5^2)
No, he's right. In your example, n=5, not 4, since you have 5 odd numbers, not 4.MOFS said:Actually isn't that (n+1)^2?!
eg when n=4, it would be 1 + 3 + 5 +7 + 9 = 25 (5^2)
It works even if n=1, since the first n odd numbers =1, summed =1, and equals 1^2.
emw said:
Actually, retrospectively, we're both right. In my case, n would be the number in the sequence ie 1) 1 + 3 = 2^2 (2) 1 + 3 + 5 = 3^2...(n) 1 + 3 + 5 +...+nth odd number = (nth odd number+1)^2. When n=9, the square is 100.
In your example, n=the number of odd numbers in the sequence ie when there are 9 numbers in the sequence n=9 and the square = 81.
More than one way to skin a cat! And cause maths confusion...
Ah, yes. Thinking outside the box, I see!MOFS said:Actually, retrospectively, we're both right. In my case, n would be the number in the sequence ie 1) 1 + 3 = 2^2 (2) 1 + 3 + 5 = 3^2...(n) 1 + 3 + 5 +...+nth odd number = (nth odd number+1)^2. When n=9, the square is 100.
In your example, n=the number of odd numbers in the sequence ie when there are 9 numbers in the sequence n=9 and the square = 81.
More than one way to skin a cat! And cause maths confusion...
Happy 5/5/5 and 05/05/05 and 050505 today!
Ahhh... a peaceful day when there will be no arguing over whether dates should be shown as day-month-year or month-day-year or year-month-day.
I find it interesting that most people are happy to write days and months with either one or two digits (05/05/05 or 5/5/05), but are so used to years with two digits that they are going to spend the whole decade writing the year as 05. Why not just 5? After all, you only need the zeroes if you are going to write 2005.
Ahhh... a peaceful day when there will be no arguing over whether dates should be shown as day-month-year or month-day-year or year-month-day.
I find it interesting that most people are happy to write days and months with either one or two digits (05/05/05 or 5/5/05), but are so used to years with two digits that they are going to spend the whole decade writing the year as 05. Why not just 5? After all, you only need the zeroes if you are going to write 2005.
On our MBTA buses they list on the screen May 5, 2005 along with 5/5/5. So that they cover both angles. I was thinking about your number interest in another thread. Happy 5/5/5 to you also Doctor Q.
Sadly I missed it by one second of hitting the post at 5.5.55.
Sadly I missed it by one second of hitting the post at 5.5.55.
Doctor Q said:
I finally broke down this January (consider it a New Year's resolution), when the days and months went back to single digits, and began writing the year in single digit. So it took me half the decade to finally capitalize on this little productivity boost. To think of all those wasteful zeroes through the years...
Tragic.
Awimoway said:
Funny,
I'm actually adding an extra zero on the years.
i.e. Today is 5-6/005
If we all did this, we wouldn't have to worry about resetting it until 3000.
Also, in two years we will all be living in 007.
TEG
Wake up, ancient thread, wake up!
I hereby report that I celebrated the big moment yesterday when the date and time (in "sort" order) were 07 08 09 10:11:12.
I hope you all enjoyed it too!
I hereby report that I celebrated the big moment yesterday when the date and time (in "sort" order) were 07 08 09 10:11:12.
I hope you all enjoyed it too!
I consider that to be the funniest post I've read in weeks.
Edit: I'm still here, chuckling (more like "hee hee hee"), head back, slapping the chair arm.
Yes, I counted from 7 to 12, but rather than increment by 1, I incremented by epsilon so it would takes longer to get to 12.
More counting = more fun.
More counting = more fun.
Thought you might appreciate this
and you were 1 post short of the 69th post of this thread
I have to confess I noticed it tooWake up, ancient thread, wake up!
I hereby report that I celebrated the big moment yesterday when the date and time (in "sort" order) were 07 08 09 10:11:12.
I hope you all enjoyed it too!
You could also round it to post 3141593.continuing Dr. Q's Pi fetish, here's the pi thread
Or thread 314159.
123 123
Many couples in the U.S. are getting married tomorrow because the date is 12-31-23, aka 123-123. That's another great date pattern to add to our list. If you want to get married tomorrow, you'd better get planning right now! (And if you're already married, you'll have to get a quickie divorce today in order to get re-married tomorrow.)
In RFC 822 format, but with a 2-digit year, tomorrow is 23-12-31 or 231-231, another repeated 3-digit pattern.
By European conventions it's a less interesting date, 31-12-23 or 311-223. Europeans had a more entertaning date ten years and one month ago, when it was the palindromic date 31-11-13, or 311-113.
Regarding American m/d/y format versus European d/m/y format, something occurs to me. The European format, with the least significant number first, has always made more logical sense than the American format, with the least significant number in the middle, yet both Americans and Europeans use the American order for personal names. Shouldn't we refer to Paul Steven Jobs instead of Steven Paul Jobs?
Many couples in the U.S. are getting married tomorrow because the date is 12-31-23, aka 123-123. That's another great date pattern to add to our list. If you want to get married tomorrow, you'd better get planning right now! (And if you're already married, you'll have to get a quickie divorce today in order to get re-married tomorrow.)
In RFC 822 format, but with a 2-digit year, tomorrow is 23-12-31 or 231-231, another repeated 3-digit pattern.
By European conventions it's a less interesting date, 31-12-23 or 311-223. Europeans had a more entertaning date ten years and one month ago, when it was the palindromic date 31-11-13, or 311-113.
Regarding American m/d/y format versus European d/m/y format, something occurs to me. The European format, with the least significant number first, has always made more logical sense than the American format, with the least significant number in the middle, yet both Americans and Europeans use the American order for personal names. Shouldn't we refer to Paul Steven Jobs instead of Steven Paul Jobs?