Welcome! Check out our free B-School Guides to learn how you compare with other applicants.
Login or Register

GMATPrep Questions

This topic has 2 expert replies and 14 member replies
Goto page
  • 1,
  • 2
Next
prasant Just gettin' started! Default Avatar
Joined
18 Nov 2006
Posted:
14 messages
GMATPrep Questions Post Sun May 13, 2007 1:14 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Hey Guys,

    I just finished taking a GMATPrep Practice Test and got the following quant questions wrong. Can someone please help me solve these problems? (I have fixed the mistake I made in #26)



    Thanks Smile

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    prasant Just gettin' started! Default Avatar
    Joined
    18 Nov 2006
    Posted:
    14 messages
    Post Sun May 13, 2007 1:16 pm
    Thanks to a lot that I learnt on this forum, I am finally getting to where I wanna be:



    I have my test scheduled for May 19.

    GMAT/MBA Expert

    Stacey Koprince GMAT Instructor
    Joined
    27 Dec 2006
    Posted:
    2228 messages
    Followed by:
    576 members
    Thanked:
    595 times
    GMAT Score:
    780
    Post Thu May 17, 2007 7:25 pm
    Hi - you'll be more likely to get replies if you break your questions up into separate posts - most people who see so many questions in a row will be overwhelmed and move to another post. Smile

    _________________
    Please note: I do not use the Private Messaging system! I will not see any PMs that you send to me!!

    Stacey Koprince
    GMAT Instructor
    Director of Online Community
    Manhattan GMAT

    Contributor to Beat The GMAT!

    Learn more about me

    Free Manhattan GMAT online events - The first class of every online Manhattan GMAT course is free. Classes start every week.
    atarafder Just gettin' started! Default Avatar
    Joined
    12 May 2007
    Posted:
    17 messages
    Post Fri May 18, 2007 2:26 pm
    17.
    If Don had travelled the whole of x-miles at 60 mph, his travel time would have been t= x/60

    His actual travel time is = (x-5)/60 + 5/30
    = x/60 + 1/12

    This means that his travel time was increased by 1/12 hours.

    =(1/12)*100/x/60 = 500/x %

    atarafder Just gettin' started! Default Avatar
    Joined
    12 May 2007
    Posted:
    17 messages
    Post Fri May 18, 2007 2:32 pm
    26.
    1. Insufficient
    2. for the tip t be $8 the bill must be >=40 and </49
    15% of 49 <$7.5, so sufficient

    atarafder Just gettin' started! Default Avatar
    Joined
    12 May 2007
    Posted:
    17 messages
    Post Fri May 18, 2007 2:41 pm
    33.Let the # of cameras produced in 1993 = 100
    # of cameras in 1994 (x% more of that produced in 1993) = 100*(100+x)/100 = 100 + x

    # of cameras produced in 1995 (y% more than that produced in 1994) = (100+y) (100+x)/100 = 100 (1 + x+y + xy/100)

    1. Insufficent

    2. Sufficient

    bww Rising GMAT Star Default Avatar
    Joined
    29 Apr 2007
    Posted:
    55 messages
    Thanked:
    1 times
    Post Fri May 18, 2007 3:25 pm
    For #26...

    Isn't 1) sufficient? We know that Martin takes the tens digit of the amount of his bill x2 as the amount of his tip. Assuming his bill is $16, he would then leave a $2 tip. 15% of 16 if $1.80, so yes, the tip is greater than 15% of the amount of the bill. A 15% tip on a $49 bill would be $7.35, but Martin's rule of thumb has him leaving $8 as a tip. So, 1) is sufficient.

    2) If he leaves an $8 tip, then his bill must have been between $40-49. 15% tip on $40 is $6, and $7.35 on a $49 tab. 2) alone must also be sufficient...

    Answer is D?

    prasant Just gettin' started! Default Avatar
    Joined
    18 Nov 2006
    Posted:
    14 messages
    Post Fri May 18, 2007 8:50 pm
    Guys, Thanks for the responses. Very helpful.

    Sadowski Rising GMAT Star
    Joined
    27 Apr 2007
    Posted:
    91 messages
    Thanked:
    1 times
    Test Date:
    6/28/07
    Target GMAT Score:
    730
    Post Mon May 21, 2007 6:33 am
    bww wrote:
    For #26...

    Isn't 1) sufficient? We know that Martin takes the tens digit of the amount of his bill x2 as the amount of his tip. Assuming his bill is $16, he would then leave a $2 tip. 15% of 16 if $1.80, so yes, the tip is greater than 15% of the amount of the bill. A 15% tip on a $49 bill would be $7.35, but Martin's rule of thumb has him leaving $8 as a tip. So, 1) is sufficient.

    2) If he leaves an $8 tip, then his bill must have been between $40-49. 15% tip on $40 is $6, and $7.35 on a $49 tab. 2) alone must also be sufficient...

    Answer is D?
    Actually, 15% of $16 is $2.40, so his $2 tip is not greater than 15%. B is the only sufficient answer.

    mikeclarke44 Just gettin' started! Default Avatar
    Joined
    09 Jun 2007
    Posted:
    13 messages
    Post Sun Jun 10, 2007 1:33 pm
    #27
    I don't know why they posted it incorrect. I come up with a value for r when I use #1 and #2

    1). r=3m
    2). r/2 + m/2 =12 r + m = 24

    3m + m = 24
    4m = 24
    m= 6, r=18

    That answer should have been (C)

    mikeclarke44 Just gettin' started! Default Avatar
    Joined
    09 Jun 2007
    Posted:
    13 messages
    Post Sun Jun 10, 2007 1:34 pm
    #27
    I don't know why they posted it incorrect. I come up with a value for r when I use #1 and #2

    1). r=3m
    2). r/2 + m/2 =12 r + m = 24

    3m + m = 24
    4m = 24
    m= 6, r=18

    That answer should have been (C)

    vrider Just gettin' started! Default Avatar
    Joined
    01 May 2007
    Posted:
    17 messages
    Post Sun Jun 10, 2007 3:18 pm
    From (1) r=3m , insufficient
    From (2) r-12 = 12-m , insufficient

    combining, r-12 = 12 - r/3
    4/3*r = 24 or r = 18

    So, C?

    Hmm...I think I am missing something here...let me check.

    vrider Just gettin' started! Default Avatar
    Joined
    01 May 2007
    Posted:
    17 messages
    Post Sun Jun 10, 2007 3:27 pm
    Ok, I think I know why. Assumption that r=3m is wrong. If m is negative, distance from 0 to r can still be 3 times distance from m to 0 i.e. r=3m or r = -3m.

    Hence, combining (1) & (2) is still insufficient to find r.

    restero Just gettin' started! Default Avatar
    Joined
    14 Apr 2009
    Posted:
    4 messages
    Post Tue Mar 09, 2010 10:23 am
    #27 is E
    as r=3m or r=-3m

    solving u get 6, 18 and -12, 36; So E!

    harsh001 Just gettin' started! Default Avatar
    Joined
    12 Mar 2010
    Posted:
    6 messages
    Post Sat Mar 13, 2010 5:57 pm
    #19

    Let X = 1 and Y = 2 then equation = -1/3 < 1
    Let X = 1 and Y = -2 then equation = -3/2 < 1
    Let X =0 and Y = 1 then equation = 1 = 1
    Let X = 0 and Y =-1 then equation = -1 < 1
    Let X = -1 and Y = 2 then equation = -3 < 1
    Let X =-1 and Y = -2 then equation = -1/3 < 1

    therefore in all cases the equation in not greater than 1 if we take similar values of condition 2 we will see that each condition in its own answers the question therefore D is the answer!!

    Best Conversation Starters

    1 abhasjha 35 topics
    2 shibsriz@gmail.com 32 topics
    3 phanikpk 20 topics
    4 prernamalhotra 13 topics
    5 qwerty12321 11 topics
    See More Top Beat The GMAT Members...

    Most Active Experts

    1 image description GMATGuruNY

    The Princeton Review Teacher

    175 posts
    2 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    167 posts
    3 image description ceilidh.erickson

    Manhattan GMAT Teacher

    47 posts
    4 image description CriticalSquareMBA

    Critical Square

    40 posts
    5 image description lunarpower

    Manhattan GMAT Teacher

    29 posts
    See More Top Beat The GMAT Experts