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20 models of sports cars

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gmattesttaker2 Legendary Member Default Avatar
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20 models of sports cars

Post Sat Jun 14, 2014 10:25 pm
Hello,

I was wondering how to best approach question 3 here:

The least expensive model produces the least horsepower per liter of engine size?

OA : Yes


Thanks a lot,
Sri
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Post Sun Jun 15, 2014 12:41 am
Hi Sri,

To answer this question, we need data from 2 columns: "Horse Power" and "Engine Size"

We're asked if the least expensive model (The Tesco) has the lowest ratio of horsepower/engine size.

The Tesco's ratio is 310/5.7

For a ratio to be lower than this, we would need EITHER a smaller numerator OR a bigger denominator (or both).

I'd start by looking at cars with a lower horsepower. There aren't many, but they all have a significantly lower Engine Size (relative to the Tesco), so their ratios are NOT smaller.

Next, I'd look at cars with a bigger Engine Size. There aren't too many here either, but they all have a significantly higher Engine Size (relative to the Tesco), so their ratios are NOT smaller.

The model that seems closest is the PTZ at 400/6.2

The Tesco: 310/5.7 = about 54:1 while the PTZ: 400/6.2 = about 66:1

The Tesco DOES have the lowest ratio.

Final Answer: Yes

GMAT assassins aren't born, they're made,
Rich

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Last edited by Rich.C@EMPOWERgmat.com on Wed Jul 16, 2014 11:25 pm; edited 1 time in total

Thanked by: gmattesttaker2, noiceman
WesternOverseas Newbie | Next Rank: 10 Posts Default Avatar
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Post Wed Jul 16, 2014 3:25 am
Nice post.

Post Wed Jul 16, 2014 11:29 pm
Hi WesternOverseas,

I'm glad you found my explanation to be helpful. Most IR questions are more about staying organized than doing lots of math. When dealing with these types of data-heavy prompts, it's important to understand the general layout and content of any tables you're given, take notes on what you'll need to answer a given question, then pull the data from the table. Sometimes you'll be asked to do a little math, but more often than not, you'll be asked to deal with a pattern of some kind. Either way, the task usually won't take too much "work" on your part.

GMAT assassins aren't born, they're made,
Rich

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Contact Rich at Rich.C@empowergmat.com

berrybreet Newbie | Next Rank: 10 Posts Default Avatar
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Posted:
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Post Tue Jan 20, 2015 2:28 am
this is very nice post



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Nawaz

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