Results 1 to 4 of 4

Math Help - Finding the sum of the digits of the number

  1. #1
    Newbie
    Joined
    Jan 2012
    Posts
    9

    Finding the sum of the digits of the number

    Compute the sum of the digits of the number given by

    Finding the sum of the digits of the number-untitled.png
    If a<b, ab = 6 and a + b = 5.

    I was putting a = 5-b and substitute in but unable to solve it. Appreciate if you show me how to solve it.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    29

    Re: Finding the sum of the digits of the number

    Quote Originally Posted by stevecowall View Post
    If a<b, ab = 6 and a + b = 5.
    you have a=5-b so (5-b)b=6 \implies b^2-5b+6=0

    Can you solve this quadratic?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member ILikeSerena's Avatar
    Joined
    Dec 2011
    Posts
    733
    Thanks
    121

    Re: Finding the sum of the digits of the number

    Welcome to MHF, stevecowall!

    How many ways do you know to factorize ab=6?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Jan 2012
    Posts
    9

    Re: Finding the sum of the digits of the number

    Thank you I have figure it out already thanks so much
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: May 3rd 2011, 04:22 PM
  2. Replies: 1
    Last Post: February 11th 2011, 04:52 AM
  3. Replies: 7
    Last Post: November 28th 2010, 10:22 PM
  4. Replies: 5
    Last Post: August 4th 2009, 02:28 PM
  5. Finding last two digits of a large number
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: March 29th 2009, 01:30 AM

Search Tags


/mathhelpforum @mathhelpforum