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:

0% (00:00) correct
0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

if \(x^2=y+5\) and \(y=z-2\) and z=2x , is \(x^3+y^2+z\) divisible by 7?

1) x>0 2) y=4

Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient EACH statement ALONE is sufficient Statements (1) and (2) TOGETHER are NOT sufficient If we substitute z and y with x in the three equations we have _________________

Your attitude determines your altitude Smiling wins more friends than frowning

D is the answer. St.1 By substitutions one can get the equation, x^2 - 2x-3 =0 Solving for x, x= +3 or -1; If x=3, then y=4 and z=6 Putting these values in, we get the result of 49 which is divisible by 7. However, if x= -1, we get 13 as the result and it is not divisible by 7. Therefore, St.1 is required and sufficient.

St. 2 By putting the values in, we get 49 that is divisible by 7. So, sufficient.

if \(x^2=y+5\) and \(y=z-2\) and z=2x , is \(x^3+y^2+z\) divisible by 7?

1) x>0 2) y=4

Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient EACH statement ALONE is sufficient Statements (1) and (2) TOGETHER are NOT sufficient If we substitute z and y with x in the three equations we have

What is the OA dude ? B is very tempting.. but when i try stem 1 with x=1,2,3,4, and 5.. only x=3 seems to satisfy all the 3 equations in the question. So D is looks realistic. what is the source and OE ?

if \(x^2=y+5\) and \(y=z-2\) and z=2x , is \(x^3+y^2+z\) divisible by 7?

1) x>0 2) y=4

Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient EACH statement ALONE is sufficient Statements (1) and (2) TOGETHER are NOT sufficient If we substitute z and y with x in the three equations we have

(1)here solving eqns we get x=-1,3 => 3 gives div by 7 but when x=-1 the expr is noit div => INSUFFI (2)gives x=3 and hence when substituted the expr is div by 7 SUFFI

if \(x^2=y+5\) and \(y=z-2\) and z=2x , is \(x^3+y^2+z\) divisible by 7?

1) x>0 2) y=4

Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient EACH statement ALONE is sufficient Statements (1) and (2) TOGETHER are NOT sufficient If we substitute z and y with x in the three equations we have

(1)here solving eqns we get x=-1,3 => 3 gives div by 7 but when x=-1 the expr is noit div => INSUFFI (2)gives x=3 and hence when substituted the expr is div by 7 SUFFI

IMO B

i made silly mistake overlooked x>0 oh god!!! _________________