Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:00

Expert's post

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

55% (hard)

Question Stats:

40% (01:16) correct
60% (00:44) wrong based on 84 sessions

HideShow timer Statictics

Veritas Prep 10 Year Anniversary Promo Question #7

One quant and one verbal question will be posted each day starting on Monday Sept 17th at 10 AM PST/1 PM EST and the first person to correctly answer the question and show how they arrived at the answer will win a free Veritas Prep GMAT course ($1,650 value). Winners will be selected and notified by a GMAT Club moderator. For more questions and details please check here: veritas-prep-10-year-anniversary-giveaway-138806.html

To participate, please make sure you provide the correct answer (A,B,C,D,E) and explanation that clearly shows how you arrived at it. Winners will be announced the following day at 10 AM Pacific/1 PM Eastern Time.

What is the value of integer \(z\)?

(1) \(z\) is the remainder when positive integer y is divided by positive integer \((y - 1)\)

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:01

1

This post received KUDOS

Expert's post

1

This post was BOOKMARKED

We have a winner!

Winner:

AbhiJ

Official Explanation:

Answer is C

This question is a classic “Why Are You Here?” question. Statement 1 may look sufficient if you pick numbers (8 and 7; 15 and 14; 5 and 4 → the remainder is always 1). But what about 2 and 1? There’s no remainder there, so z would equal 0. This is why statement 2 is so important. Alone, it’s useless...so why is it there? Statement 2 tells us that (y - 1) cannot be 1, because y cannot be 2. This takes away that one flaw with statement 1, and means that both statements together are sufficient. But of more strategic importance, statement 2 should alert you to that problem with statement 1. Most test-takers miss that flaw when looking at statement 1 alone, but astute test-takers will reconsider once statement 2 is presented. _________________

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:03

What is the value of integer z?

(1) z is the remainder when positive integer y is divided by positive integer (y - 1) (2) y is not a prime number Answer is C 1 insufficient as remainder can be 1, 2 2) insufficient 3) both sufficient _________________

If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS. Kudos always maximizes GMATCLUB worth-Game Theory

If you have any question regarding my post, kindly pm me or else I won't be able to reply

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:05

Option C. Since y-1 is positive.. y has to be atleast 2. now for any y>2, y/y-1 will give 1 as remainder but for Y=2 remainder is 0. however y is not prime.. so can not be 2. hence we know remainder will be 1 from above.

Last edited by Manjulika on 20 Sep 2012, 10:46, edited 1 time in total.

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:05

Bunuel wrote:

Veritas Prep 10 Year Anniversary Promo Question #7

One quant and one verbal question will be posted each day starting on Monday Sept 17th at 10 AM PST/1 PM EST and the first person to correctly answer the question and show how they arrived at the answer will win a free Veritas Prep GMAT course ($1,650 value). Winners will be selected and notified by a GMAT Club moderator. For more questions and details please check here: veritas-prep-10-year-anniversary-giveaway-138806.html

To participate, please make sure you provide the correct answer (A,B,C,D,E) and explanation that clearly shows how you arrived at it. Winners will be announced the following day at 10 AM Pacific/1 PM Eastern Time.

What is the value of integer \(z\)?

(1) \(z\) is the remainder when positive integer y is divided by positive integer \((y - 1)\)

(2) \(y\) is not a prime number

Ans: A

Z = 1

y-1 and y are two consecutive numbers. When divided it will give remainder 1 _________________

My mantra for cracking GMAT: Everyone has inborn talent, however those who complement it with hard work we call them 'talented'.

+1 Kudos = Thank You Dear Are you saying thank you?

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:07

1

This post received KUDOS

Ans is C Statement1: for ex y=2 2/1 then remainder =0 if y=3 3/2 then remainder=1 Not sufficient Statement2: y can be 1,4,6 ---Not sufficent By combining both y cannot be 2,so in all cases remainder will be 1 Hence sufficient

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:08

Bunuel wrote:

Veritas Prep 10 Year Anniversary Promo Question #7

One quant and one verbal question will be posted each day starting on Monday Sept 17th at 10 AM PST/1 PM EST and the first person to correctly answer the question and show how they arrived at the answer will win a free Veritas Prep GMAT course ($1,650 value). Winners will be selected and notified by a GMAT Club moderator. For more questions and details please check here: veritas-prep-10-year-anniversary-giveaway-138806.html

To participate, please make sure you provide the correct answer (A,B,C,D,E) and explanation that clearly shows how you arrived at it. Winners will be announced the following day at 10 AM Pacific/1 PM Eastern Time.

What is the value of integer \(z\)?

(1) \(z\) is the remainder when positive integer y is divided by positive integer \((y - 1)\)

(2) \(y\) is not a prime number

(E) (1) INSUFF because values will be diffrent if y is even or odd so z will vary (2) insufficient to answer the given question together also, not possible to figure out z _________________

" Make more efforts " Press Kudos if you liked my post

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:12

What is the value of integer ?

(1) is the remainder when positive integer y is divided by positive integer

(2) is not a prime number

the answer is E y and y-1 is consequetive integers so y divided by y-1 results remainder of 1 which is unknown INSUFFICIENT 2 is clearly INSUFFICIENT together is also INSUFFICIENT to say the value of z because when y is 1 y-1 will be 0 which cannot be the case and 1 is not a prime

Last edited by SobirovaZulxumor on 20 Sep 2012, 10:31, edited 2 times in total.

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:15

My Ans IS E-

Statement 1-z is the remainder when positive integer y is divided by positive integer (y - 1)- not sufficient the nos can vary Statement 2- By itself also not sufficient to find Z Together also not sufficient. _________________

I've failed over and over and over again in my life and that is why I succeed--Michael Jordan Kudos drives a person to better himself every single time. So Pls give it generously Wont give up till i hit a 700+

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:17

Answer is A

(1)y/(y-1)=1+1/(y-1); since z is integer so (y-1) must be 1 or -1. But y-1>0. Then,(y-1) must be 1 => z=1=>(1)Sufficient (2)y is not prime number is not Sufficient. So A

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:32

What is the value of integer ?

(1) is the remainder when positive integer y is divided by positive integer

(2) is not a prime number _________________

Statement 1 is sufficient - Y is a positive number so 1, 2,3,......... and Y-1 is also a Positive number, therefore minimum value of Y can be either 2, 3, 4, etc. ... and remainder always be 1, So value of Z is 1 statement 2- Y is not a prime number, Since it is a positive number so it will again the number can be 4, 6 , 8, 9, 10 etc. and Y-1 will always result in 1 less than the number itself... So Remainder will be 1

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:38

fameatop wrote:

What is the value of integer z?

(1) z is the remainder when positive integer y is divided by positive integer (y - 1) (2) y is not a prime number Answer is C 1 insufficient as remainder can be 1, 2 2) insufficient 3) both sufficient

How remainder can be 2 in statement1...Obviously not possible

Re: Veritas Prep 10 Year Anniversary Promo Question #7 [#permalink]

Show Tags

20 Sep 2012, 10:49

Numbers of the form (y,y-1) are called coprimes because they have only 1 common factor and that is 1. The only scenario when y divided by y-1 will give a remainder 0 is when y is 2 but since statement says that, y cannot be a prime number. So both the statements together are sufficient to answer the question.

So, my final tally is in. I applied to three b schools in total this season: INSEAD – admitted MIT Sloan – admitted Wharton – waitlisted and dinged No...

A few weeks ago, the following tweet popped up in my timeline. thanks @Uber_Mumbai for showing me what #daylightrobbery means!I know I have a choice not to use it...

“This elective will be most relevant to learn innovative methodologies in digital marketing in a place which is the origin for major marketing companies.” This was the crux...