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:

If X and Y are integers greater than 1, is X a multiple of Y?

\((1) 3Y^2 + 7Y = X\)

\((2) X^2 - X\) is a multiple of \(Y.\)

1st statement - Y(3Y+1) = X implies that... X is a multiple of Y... - sufficient

2nd Statement - i am not sure the best way... but i tried to use some arbitrary smart #s which will give me X>1. X(X-1) is multiple of Y... so ex- if Y=6, then X =3.. so X is not a multiple of Y. or Y = 12, then X = 4 again X is not a multiple of Y.

The answer should be (A) - statement (1) alone is sufficient to answer the question.

Consider statement (1) first: X = 3Y^2 + 7Y => X = Y (3Y + 7) => X = Y * some number Therefore X is a multiple of Y. So statement (1) alone is sufficient.

Next consider statement 2: X^2 - X is a multiple of Y => kY = X(X-1) where k is any integer >= 1 => X = kY/(X-1) = [k/(X-1)]Y Therefore X is a multiple of Y depending on whether k/(X-1) is an integer or not. For k = 4 and X = 5, this works. For k=5, X=5 it does not work. Therefore statement (2) alone is insufficient to answer the question.

Hence (A) is the correct answer choice. _________________

If x and y are integers greater than 1, is x a multiple of y?

(1)3y^2 + 7y = x (2)x^2 -x is a multiple of y

(1) x=3y^2+7y= y ( 3y+7) , since y is an integer---> 3y+7 is an integer ---> x is a multiple of y
---->suff

(2) x^2-x is a multiple of y
pick number x = 3 ,y =6 ---> x^2-x= 6 is a multiple of 6 but x=3 isn't
x=3, y=3, x^2-x= 6 is a multiple of y=3 , x=3 is a multiple of 3
--> insuff.

(1) can be written as y(3y+1)=x
y.m=x
as we know that y is an integer....3Y+1 is also an integer thus X is a multiple of Y...Sufficient

(2) x(x-1)=y
xm=y

hmm this lets see if x=4, y=2...then 4(3)=12...works fine and x is a multiple of Y...if x=5 y=4 then 5(4)=20=which is a multiple of y however x=5 is not a multiple of y=4

If x and y are integers greater than 1, is x a multiple of y?

1) 3y^2 + 7y = X 2) X^2 - X is a multiple of y

let me correct myself and change to A.

what i overlooked with (ii) is I assumed (X^2 - X) is a multiple of y, which is given. ststement (ii) doesnot tell that x is a multiple of y. if suppose x = 5 and y = 2.

(X^2 - X) = yk
25-5=2k
k=10.

but x=5 is not a multiple of y=2. so ii is not suff.

http://blog.ryandumlao.com/wp-content/uploads/2016/05/IMG_20130807_232118.jpg The GMAT is the biggest point of worry for most aspiring applicants, and with good reason. It’s another standardized test when most of us...

I recently returned from attending the London Business School Admits Weekend held last week. Let me just say upfront - for those who are planning to apply for the...