1. PF Insights is off to a great start! Fresh and interesting articles on all things science and math. Here: PF Insights

How many decimals of Pi do you remember?

  1. How many decimals of Pi do you people remember by heart. I started learning them not so long ago and so far i got:
    3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510
    58209 74944 59230 78164 06286 20899 86280 34825 34211 70679
    82148 08651 32823 06647 09384 46095 50582 23172 53594 08128
    which is exactly 150 (without cheating). I try to learn 5-10 more each day.
  2. jcsd
  3. 2 decimals. 3.14. Not that memorizing pie out to all those decimal places is pointless, but...well, yeah, it's pointless.
    Last edited: Apr 22, 2003
  4. I gotta admit, it's probably one of the less useful things i ever did in my life, but heh, i had to come up with something to do in non-physics or math classes...
  5. Oh my god! why? if you ever need to use pie why dont you just use the pie button on your calculator, far simplar.
  6. Dude, andy, pi buttons on calculators don't go to 150 digits...
  7. I'm with zk4586 on this one. I think once I may have known it to five digits but that was long ago.
  8. I just find that learning pi is a good way to maintain your memory active, plus it's a really good time waster. I found out that now i can remember series of numbers in a lot less time. I just use birthdates, repeating numbers, and my latest, pattern you do with your fingers when you type the keys on the numpad.
  9. Yes, it sounds pretty sweet and you have certainly memorized an impressive string of digits too. How about something for the coordination of the body such as juggling? If you are standing around almost anywhere with time on your hands you can usually find a few rocks and have at it…
  10. as nice as this sounds, i doubt my teachers would appreciate.
  11. they probably don't appreciate you memorizing pi in their class either so why not go the full distance and start juggling. In fact why don't you start out with chainsaws or flaming torches for that matter, I'm sure the teachers will love that, it would probably bring a lot of intelectual input to the class...
  12. Just so you know, i practice shooting for hand eye coordination. Sniping (although it has a bad reputation), is the best exercise i know to learn how to totally control how your muscles react and is quite good for coordination of body-eye coordination. I've been introduced to that sport by a friend in the army, and i just love it.
  13. What's Pi? :smile: I usually just round up at 3.142.

    When you put this statement together with your memorizing Pi to 150 decimal places, we can only hope that you live in a trailer because they don't have basements to hide victims bodies. Just kidding, (I hope)
  14. Hi

    If caculators don't go up to 150 digits then you can't use 150 digits of PI when using a caculator and you would need a caculator to work out the result of any sum involving pi at 150 digits
  15. Artman: True :smile: it may seem weird when you read those statements one after the other. If only considering those two statements, i would in fact seem like a complete maniac... Which i can reassure you i am not: i use an air rifle, which means that i have no clue about how to handle a rifle with recoil and i am thus completely harmless. lol, i'll be more careful next time and try to express myself clearer so i don't look like a psycho.

    Alex00: I never use that many decimal places for calculations, if you know about significant figures then you know it would be completely useless anyways. It's just for the fun of it.
  16. hi

    fun, in maths?
  17. So very very sad, how can you have fun in a maths lesson the only reason its like at my college is because the maths teacher is very sexy and all the blokes want to give her one but thats a different topic all together, the only good thing about maths is its very useful whilst studying physics, at least alex00 agress with me.
  18. enigma

    enigma 1,817
    Staff Emeritus
    Science Advisor
    Gold Member


    How many do I use if I'm not using a calculator?


    If I'm reeeeallly picky, I just round up the answer a bit to deal with the .14.

    Otherwise, it's kinda pointless to do it in your head, so why bother memorizing?
  19. 3.1415926

    that's all i got. but that's without actually trying to memorize it. it may not be 150 decimal places, but most people look at me funny when i reel it off, and that's good enough for me
  20. LURCH

    LURCH 2,514
    Science Advisor

    I memorised it to 14 digits as a child. Based on a famous quotation by Albert Einstein: "How I need a drink. Alcoholic, of course, after the heavy chapters involving quantum mechanics." The number of letters in each word successively correspond to the digits in Pi.

    I find it useful as a sort of "mantra", it helps me calm myself down when getting overly emotional. Maybe such numerical recitation would be useful in any activity requiring calm nerves and an even mind. Sniping, perhaps?
Know someone interested in this topic? Share a link to this question via email, Google+, Twitter, or Facebook

Have something to add?