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

Homework Help: Math question, please help asap.

  1. Jan 21, 2005 #1
    If the average of 8 consecutive numbers is X. What is the largest number in terms of X?

    I have no idea on how to solve this question. thx.
  2. jcsd
  3. Jan 21, 2005 #2
    let the largest number be n, the rest is n-1,n-2.....n-7...the average of these eight number is X... you have 1 equation and two unknow... so you can find n in term of X
  4. Jan 21, 2005 #3
    the sum of 8 consecutive numbers can be written as such: (n+n+7)8/2 following the whole (n1+nfinal)(total/2) form. Using this, we get that (n+n+7)4/8=x or 2x=2n+7, meaning that n=(2x-7)2
  5. Jan 21, 2005 #4
    o ok i c, but u must set another variable.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook