1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Complex Mathematical Puzzle

  1. Apr 26, 2009 #1
    Complex Mathematical Puzzle!!!

    Distribute 20 lbs of pressure in 5 hours, the numbers Must be Odds and each hour must have a value; you cant use even numbers, nor frations, just positives completes!!

    wich are the values??
  2. jcsd
  3. Apr 26, 2009 #2
    Re: Complex Mathematical Puzzle!!!

    Well technically 0 is a value, so

    hour 1 = 17
    hour 2 = 1
    hour 3 = 1
    hour 4 = 1
    hour 5 = 0.

    If 0 is not counted then there is no real solutions.
  4. Apr 26, 2009 #3


    User Avatar
    Gold Member

    Re: Complex Mathematical Puzzle!!!

    two odds always make an even. 2n+1 + 2n+1 = 4n+2. Since any integer 2n is always even, 4n is also always even. And any even number plus 2 is always even. This also implies 4 odds always make an even.

    Then to add an odd to the even number makes it odd

    Thus this problem has no solution.

    If 0 is acceptable then it has a few solutions.
  5. Apr 26, 2009 #4


    User Avatar
    Science Advisor
    Homework Helper

    Re: Complex Mathematical Puzzle!!!

    Zero isn't odd in any system of defining 'odd' I've ever heard of. I'm not sure what the point of this problem is. Anybody have any idea?
  6. Apr 27, 2009 #5
    Re: Complex Mathematical Puzzle!!!

    The answer is you can't
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Complex Mathematical Puzzle Date
Are these homomorphisms? Tuesday at 10:50 AM
Prove that this function is holomorphic Mar 16, 2018
Numerical/Analytical Solution to a Complex Integral Mar 6, 2018
Complex Integral to error function Mar 5, 2018