Domestic cars

Expert replies

GmatGreen: Senior | Next Rank: 100 Posts; Posts: 85; Joined: Tue Mar 31, 2009 10:58 am

by GmatGreen » Wed Dec 11, 2013 8:43 am

During the 2nd quarter of 1984, a total of 2,976,000 domestic cars were sold. If this was 24 percent greater than the number sold during the first quarter of 1984, how may were sold during the first quarter?

A) 714,240

B) 2,261,760

C) 2,400,000

D) 3,690,240

E) 3,915,790

I get intimidated by these questions and panic without a calculator. Time saving tips?

Like this post

Source: Beat The GMAT — Problem Solving | Wed Dec 11, 2013 8:43 am

Patrick_GMATFix: GMAT Instructor; Posts: 1052; Joined: Fri May 21, 2010 1:30 amFollowed by: 98 members; Thanked: 335 times

by Patrick_GMATFix » Wed Dec 11, 2013 9:04 am

This solution is taken from the GMATFix App. My signature below has more info.

-Patrick

Check out my site: GMATFix.com

To prep my students I use this tool >> (screenshots, video)

Ask me about tutoring.

Like this post

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Wed Dec 11, 2013 9:07 am

GmatGreen wrote:During the 2nd quarter of 1984, a total of 2,976,000 domestic cars were sold. If this was 24 percent greater than the number sold during the first quarter of 1984, how may were sold during the first quarter?

A) 714,240
B) 2,261,760
C) 2,400,000
D) 3,690,240
E) 3,915,790

I get intimidated by these questions and panic without a calculator. Time saving tips?

We know that 2,976,000 is 24% GREATER THAN the correct answer choice.
Answer choices D and E are both greater than 2,976,000, so we can ELIMINATE them.
Answer choice A is far too small. 2,976,000 is more than 300% greater than 714,240. So, ELIMINATE A.

This leaves us with either B or C.
C is nicer to work with, so let's test it first.
Is 2,976,000 24% greater than 2,400,000?
Well, 25% (aka 1/4) of 2,400,000 is 600,000
If we add 600,000 to 2,400,000, we get 3,000,000 (which is CLOSE to 2,976,000)
From here, we can assume that since 24% is a LITTLE LESS than 25%, then a 24% increase would result in a value a LITTLE LESS 3,000,000 (perfect - is a 2,976,000 LITTLE LESS than 3,000,000)

So, the correct answer is C

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

Like this post

Abhishek009: Master | Next Rank: 500 Posts; Posts: 359; Joined: Wed Mar 11, 2009 4:37 amFollowed by: 2 members; Location: Kolkata, India; Thanked: 50 times

by Abhishek009 » Wed Dec 11, 2013 10:18 am

GmatGreen wrote:During the 2nd quarter of 1984, a total of 2,976,000 domestic cars were sold. If this was 24 percent greater than the number sold during the first quarter of 1984, how may were sold during the first quarter?

A) 714,240

B) 2,261,760

C) 2,400,000

D) 3,690,240

E) 3,915,790

I get intimidated by these questions and panic without a calculator. Time saving tips?

Let in the first quarter 100 pcs were sold , given that there is an increase in 24% so no of units sold in the second quarter is 124 Pcs

here 124 ~ 2,976,000 ( Since it is given - During the 2nd quarter of 1984, a total of 2,976,000 domestic cars were sold )

So 1 ~ 2,976,000 /124 (2,400,0)

Therefore 100 ~ 2,400,000

Hence answer is (C)

Abhishek

Like this post

GMATGuruNY: GMAT Instructor; Posts: 15539; Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members; Location: New York, NY; Thanked: 13060 times; GMAT Score:790

by GMATGuruNY » Wed Dec 11, 2013 1:35 pm

GmatGreen wrote:During the 2nd quarter of 1984, a total of 2,976,000 domestic cars were sold. If this was 24 percent greater than the number sold during the first quarter of 1984, how may were sold during the first quarter?

A) 714,240

B) 2,261,760

C) 2,400,000

D) 3,690,240

E) 3,915,790

The answer choices represent the number of cars sold in the first quarter -- a value that increases by 24% in the second quarter:
24% = 24/100 = 12/50 = 6/25.
Since the number of cars sold increases by 6/25, the correct answer choice must be a multiple of 25, implying that the last two digits must be 00, 25, 50, or 75.

The correct answer is C.

Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review