GMAT PREP QUESTION

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Sun Jul 01, 2012 6:56 am

Algebraic Approach:

Say z = 0.abcd...
where a is the tenths digit, b is the hundredths, c is the hundredths, and d is the thousandths digit of z.

We need to find b.

Statement 1: 100z = ab.cd... --> c = 2 ---> Not sufficient

Statement 2: 1000z = abc.d... --> c = 2 ---> Not sufficient

1 & 2 Together: No new information ---> Not sufficient

The correct answer is E.

Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/

Quote

GMAT/MBA Expert

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Sun Jul 01, 2012 6:59 am

hey_thr67 wrote:What is the hundredths digit of the decimal z?

1) The tenths digit of 100z is 2
2) The units digit of 1000z is 2

The tricky part is to notice that the statements are actually different versions of each other. Both of them helps us to determine that thousandths digit of z is 2 as, thousandths digit of z = tenths digit of 100z = units digit of 1000z.

Hence, both statements together is insufficient.

The correct answer is E.

Quote

Post new topic Post Reply

• Page 1 of 1

5/5

5 Star (486 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