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This year's Pi Day Challenge uses Facebook - so you can compete against your friends and track your progress! Please note that if your network blocks access to Facebook, you can still play as a guest.

Puzzles 1-20 Available Now, Puzzles 20+ Available 3/14/2010

Puzzles 1-20 are available before Pi Day. On Sunday, all puzzles will become available!

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  1. March 13th, 2010 at 14:23 | #1

    @Michelle Van Der Wege

    Are you talking about EADGBE for the strings? I still don’t get it!

  2. March 13th, 2010 at 14:25 | #2

    @April Tea…yes, like E, A, G, etc. The colors don’t matter, although the pegs do. If you haven’t figured it out, you can clear all the colors and then add them back in one by one.

  3. March 13th, 2010 at 14:26 | #3

    @Sarah, yes, that is what I’m talking about. Read my response to April Tea, and see if that helps. If it makes a difference, I had to sleep on it to get the correct solution! Now, I’m stuck on 17 :(

  4. jamie
    March 13th, 2010 at 14:36 | #4

    i need help on #5. It asks for the circumference and I give it to them. they say it’s correct and ask for it again and i hit the button and it says it needs 3 decimal places and i give it 3 but it won’t work… HELP!!

  5. March 13th, 2010 at 14:48 | #5

    guys i rele need help with 4! plz help me!

  6. March 13th, 2010 at 14:50 | #6

    @Ashley Li

    On 4, I kept hitting the lightswitch, the measurement, the ball, the flask, the ball, the lightswitch, and then the MV…. then I hit one of the numeral things. Somehow you have to get the Measurement/Volume to equal 3.14….

  7. jasmine
    March 13th, 2010 at 14:51 | #7

    who know how to do #4!!!

  8. March 13th, 2010 at 14:53 | #8

    @jamie

    The third decimal place will round up! Then you have to click on the outer edge of the circle….

  9. March 13th, 2010 at 14:54 | #9

    @Sarah Strunk

    how do you know which plummerian numbers are which? like 1-12? and why do the numbers keep changing?

  10. March 13th, 2010 at 14:56 | #10

    @Ashley Li

    Sorry, not really sure….

  11. March 13th, 2010 at 14:58 | #11

    a lil help with 13 plz

  12. March 13th, 2010 at 14:59 | #12

    Hey hints for 17? whats the objective

  13. March 13th, 2010 at 15:02 | #13

    can anyone help me with 12?

  14. March 13th, 2010 at 15:04 | #14

    how do you do # 8 with the car??

  15. March 13th, 2010 at 15:06 | #15

    @Kathy Lane
    MWAHAHAA i helped you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  16. March 13th, 2010 at 15:07 | #16

    @Kathy Lane
    MWHAHAHHAHAhA again

  17. March 13th, 2010 at 15:26 | #17

    Starting in the top left hand corner, the numbers go in numerical order clockwise.

    @Ashley Li

  18. March 13th, 2010 at 15:27 | #18

    I’m stuck on #12. what do the letters in the globe mean? and what do they have to do with the arctic circle?

  19. March 13th, 2010 at 15:27 | #19

    A little help with #12 please!

    @Sarah Strunk

  20. March 13th, 2010 at 15:30 | #20

    i need help on 15

  21. March 13th, 2010 at 15:31 | #21

    #13 you’re probably missing a part. Once you figure it out you still need to play the guitar.

  22. March 13th, 2010 at 15:50 | #22

    I dont get what im supposed to do with #3!!!

  23. March 13th, 2010 at 15:54 | #23

    Bahh, I’m stuck on #13 with the guitar….I saw the “Guitar A-Z” Book, so I figured you’d just have to hit the strings in alphabetical order….but which E goes first?

  24. March 13th, 2010 at 15:55 | #24

    #13???

  25. March 13th, 2010 at 15:58 | #25

    Please Mr. pi we all need help with # 17!!!! just a little hint!!!!

  26. March 13th, 2010 at 16:01 | #26

    i was wondering if anyone could give me a hint for the second part of q # 8?

  27. March 13th, 2010 at 16:11 | #27

    Andrew MacDonald :
    Please Mr. pi we all need help with # 17!!!! just a little hint!!!!

    Yes! A hint please!

  28. March 13th, 2010 at 16:23 | #28

    I need help with 13… I know nothing about guitar and I’ve tried everything I can think of!

  29. March 13th, 2010 at 16:26 | #29

    The letter that pop up when you press the green light correspond to the vertices of the triangle.@Lisa Patrolia

  30. March 13th, 2010 at 16:29 | #30

    Sarah Strunk :
    I need help with 13… I know nothing about guitar and I’ve tried everything I can think of!

    Me too. I tried 314159 of the colors on the strings but I can only fit seven pink beads on the last string.

  31. March 13th, 2010 at 16:33 | #31

    @Dave Noonan

    I know! I’m getting so frustrated!

  32. March 13th, 2010 at 16:36 | #32

    I got it. The number of the beads matches which letter of the alphabet the notes are. So, the first note is E so you would need 5 green beads and so on.@Sarah Strunk

  33. March 13th, 2010 at 16:41 | #33

    @Dave Noonan

    EADGBE= 5,1,4,7,2,5? I tried that and it didn’t work…

  34. March 13th, 2010 at 16:44 | #34

    have anyone finished number 17?

  35. March 13th, 2010 at 16:44 | #35

    Sarah Strunk :
    @Dave Noonan
    I know! I’m getting so frustrated!

    Did you get my reply for #13?

  36. March 13th, 2010 at 16:45 | #36

    Did you click on the guitar pick on the left?@Sarah Strunk

  37. Ben
    March 13th, 2010 at 16:47 | #37

    some help on #7 plz

  38. March 13th, 2010 at 16:49 | #38

    @Dave Noonan

    I got it, but it’s not working for me. I put 5 on the first, then 1, 4,7,2,5 beads on the other… and nothing!

  39. March 13th, 2010 at 16:52 | #39

    I just tried it again. It should work. 5 green, 1 blue, 4 red, 7 purple, 2 yellow and 5 pink then click on the guitar pick and you should be through.@Sarah Strunk

  40. March 13th, 2010 at 17:03 | #40

    Dave Noonan :
    I just tried it again. It should work. 5 green, 1 blue, 4 red, 7 purple, 2 yellow and 5 pink then click on the guitar pick and you should be through.@Sarah Strunk

    Did you get it to work? Maybe if you get through #13 you can help me with #15.

  41. March 13th, 2010 at 17:22 | #41

    Ahh, now I’m up to #17…and I see absolutely nothing that makes sense. Can someone help with #17? I don’t understand what to do with the numbers.

  42. March 13th, 2010 at 18:01 | #42

    15 anyone?

  43. March 13th, 2010 at 18:07 | #43

    i cant get 15…. =( does anyone know how?

  44. March 13th, 2010 at 18:21 | #44

    I’m stuck there too. Do you just keep trying until they are all red or is there a pattern?@Carla Linfante

  45. March 13th, 2010 at 18:31 | #45

    @Dave Noonan
    I don’t know…I’ve been trying to get them all red…but when you get the question mark only certain ones are starred off so i don’t know if your supposed to just get those red or have those as the only ones that dont get red….

  46. March 13th, 2010 at 18:39 | #46

    There’s a question mark? @Carla Linfante

  47. March 13th, 2010 at 18:46 | #47

    @Dave Noonan
    yeah sometimes it appears…you have to watch for it. but it resets the puzzle and brings you to a different one and shows you the stars.

  48. March 13th, 2010 at 18:48 | #48

    I haven’t seen it yet and I’ve been on #15 for over an hour. Hmmmmm…@Carla Linfante

  49. March 13th, 2010 at 19:00 | #49

    okay i started all over again…it took 3 mins for the question mark to show up. i was down to only 2 circles that needed to be colored in and it showed up when i was back up to 4….i dont know if the placement of them are what causes them to show up…..i’m not sure. @dave noonan

  50. March 13th, 2010 at 19:19 | #50

    When the question mark shows you the star-circles, it returns you back to the puzzle. Then, you have to click the circles that had stars in order, by row. They’ll all turn out red.

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  1. March 14th, 2009 at 00:44 | #1
  2. March 12th, 2010 at 00:19 | #2