Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What's Next in the sequence?

  1. May 9, 2009 #1
    Sorry if it looks too foolish...

    1=5
    2=25
    3=125
    4=625
    5=?
     
  2. jcsd
  3. May 9, 2009 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    I would say 3125 and it's a no-brainer, although it's hard to tell based on finitely many terms :smile:
     
  4. May 9, 2009 #3
    I assume it's 5^5, so 3125.
     
  5. May 9, 2009 #4

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    Then again, if 1 = 5 it can be anything :)
     
  6. May 11, 2009 #5
    Yeh, 1=5 and 5=1 ;)
     
  7. May 19, 2009 #6
    3125 right? or is this a no brainer
     
  8. May 19, 2009 #7

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    So in summary:
    - First one could remark that based on 4 terms, it is hard to say something. The sequence might be 5, 25, 125, 625, 125, 25, 5, 25, ... for all we know.
    - Anyway, looking at the sequence 5, 25, 125, 625 one would expect 3125.
    - Looking at the first line, "1 = 5", one would say that "5 = 1"
    - But then one could counter this semi-mathematical argument by a rigorous one, saying that if 1 = 5 then we have a true contradiction, hence we can show that 5 is equal to anything we like.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook