+ Reply to Thread
Results 1 to 3 of 3

Thread: Very interesting equations DS

  1. #1
    Within my grasp! ap1010 just joined TestMagic. ap1010's Avatar
    Join Date
    Mar 2005
    Posts
    143

    Very interesting equations DS

    Jim bought some pencils for $0.35 each and some notebooks for $0.45 each. How many notebooks did he buy ?

    (1) He bought same number of Notebooks and Pencils
    (2) He spent a total of $3.2 on the notebooks and Pencils

    SPOILER: B

  2. #2
    Gone in 120 sec Shooter just joined TestMagic.
    Join Date
    Mar 2008
    Posts
    604
    For our convenience let us multiply all the numbers by 100.

    Given eqn: 35P+45N ;N=?

    (I) P=N ; 35P+45P nothing helps as we dont have RHS of the eqn.

    (II) 35P+45N=320
    => 7P+9N=64

    Only when P=4 and N=4 the eqn holds good. We can have different decimals but number of pencils and number of notebook cant be in decimals. SUFF

  3. #3
    Within my grasp! ap1010 just joined TestMagic. ap1010's Avatar
    Join Date
    Mar 2005
    Posts
    143
    Hmm....great...I was trying to do it using decimals ...and was just wondering how to know that there is only possible solution for (2). I like your approach Shooter - to make the equation simple....and in that way its quite evident that 4 is the answer

+ Reply to Thread

Similar Threads

  1. Equations
    By El Cucu in forum GMAT
    Replies: 2
    Last Post: 01-06-2009, 06:40 AM
  2. equations
    By dsk02 in forum GMAT Problem Solving
    Replies: 7
    Last Post: 08-26-2008, 06:10 PM
  3. Equations
    By Dean77 in forum GMAT Problem Solving
    Replies: 3
    Last Post: 06-07-2008, 10:36 AM
  4. Equations II
    By Dean77 in forum GMAT Problem Solving
    Replies: 2
    Last Post: 06-07-2008, 04:11 AM
  5. DS: Equations
    By srinirao2006 in forum GMAT Data Sufficiency
    Replies: 3
    Last Post: 06-26-2006, 11:11 PM

Bookmarks

What you can do

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

SEO by vBSEO 3.5.0 RC2