• PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer

Rounding question - something bothering me

This topic has 1 expert reply and 0 member replies
richewalsh Newbie | Next Rank: 10 Posts Default Avatar
Joined
09 Jan 2015
Posted:
3 messages

Rounding question - something bothering me

Post Thu Jan 29, 2015 2:51 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    I got the question, right but one aspect is bothering me and I'm sure it is just an oversight or rookie mistake, but any help is much appreciated.

    On a recent trip, Cindy drove her car 290 miles , rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car got on this trip must have been between?

    a - 290/12.5 and 290/11.5

    b - 295/12 and 285/11.5

    c - 285/12 and 295/12

    d - 285/12.5 and 295/11.5

    e - 295/12.5 and 285/11.5

    The correct answer is d. I understand the range of putting the furthest distance with lowest mpg and closest with highest mpg. But I thought the 295 figure should have been 294. 295 would be rounded to 300 miles, no?

    Minor issue, but has been bothering me. TIA

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Thu Jan 29, 2015 2:55 pm
    Quote:
    On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car got on this trip must have been between

    A) 290/12.5 to 290/11.5

    B) 295/12 to 285/11.5

    C) 285/12 to 295/12

    D) 285/12.5 to 295/11.5

    E) 205/12.5 to 285/11.5
    We round UP when we reach the HALFWAY point between two values.
    Any value BELOW the halfway point is rounded DOWN.

    290 miles, rounded to the nearest 10 miles:
    285 ≤ m < 295.
    Please note that 295 is the UPPER LIMIT.
    Any value below 295 -- even 294.999 -- is rounded DOWN to 290.

    12 gallons of gasoline, rounded to the nearest gallon:
    11.5 ≤ g < 12.5.
    Please note that 12.5 is the UPPER LIMIT.
    Any value below 12.5 -- even 12.499 -- is rounded DOWN to 12.

    Worst miles per gallon = (lower limit for miles)/(upper limit for gas) = 285/12.5.
    Best miles per gallon = (upper limit for miles)/(lower limit for gas) = 295/11.5.
    Thus, miles per gallon is between 285/12.5 and 295/11.5.

    The correct answer is D.

    _________________
    Mitch Hunt
    GMAT Private Tutor
    GMATGuruNY@gmail.com
    If you find one of my posts helpful, please take a moment to click on the "Thank" icon.
    Available for tutoring in NYC and long-distance.
    For more information, please email me at GMATGuruNY@gmail.com.

    Thanked by: utkalnayak
    Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now.

    Best Conversation Starters

    1 Vincen 132 topics
    2 lheiannie07 65 topics
    3 LUANDATO 54 topics
    4 Roland2rule 43 topics
    5 ardz24 40 topics
    See More Top Beat The GMAT Members...

    Most Active Experts

    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    133 posts
    2 image description GMATGuruNY

    The Princeton Review Teacher

    114 posts
    3 image description EconomistGMATTutor

    The Economist GMAT Tutor

    113 posts
    4 image description Rich.C@EMPOWERgma...

    EMPOWERgmat

    109 posts
    5 image description DavidG@VeritasPrep

    Veritas Prep

    72 posts
    See More Top Beat The GMAT Experts