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!

Half my age again?

  1. Mar 22, 2012 #1
    1. The problem statement, all variables and given/known data
    I need a rock solid proof.

    Is it possible to be half someones age more than once?

    Eg. I was born at 0 while my dad was born at 20, he will be 40 when I am 20 hence I am half his age. Is this possible more than once?
     
  2. jcsd
  3. Mar 22, 2012 #2
    The difference in your ages is fixed. Use that constant to show that the fraction only ever decreases.

    (Quibble: in your example, if I die when I'm 30, will I again be half my Dad's age when he turns 60?)
     
  4. Mar 22, 2012 #3
    You have two ages, which can be represented by functions which are linear in time, what do you know about the solutions to systems of linear equations?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Half my age again?
  1. An age problem (Replies: 1)

  2. Chicken and a half? (Replies: 17)

  3. Trig again (Replies: 2)

  4. Probability again (Replies: 3)

Loading...