It is currently 12 Dec 2018, 07:21

### GMAT Club Daily Prep

#### 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

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

# x > 1 and y > 1

Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 5150
Followers: 77

Kudos [?]: 1030 [0], given: 4640

x > 1 and y > 1 [#permalink]  15 Jun 2018, 04:45
Expert's post
00:00

Question Stats:

58% (00:46) correct 41% (00:38) wrong based on 41 sessions
$$x > 1$$ and $$y > 1$$

 Quantity A Quantity B $$\frac{1}{\frac{1}{x} + \frac{1}{y}}$$ $$\frac{1}{x} + \frac{1}{y}$$

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________
GRE Forum Moderator
Joined: 29 May 2018
Posts: 118
Followers: 0

Kudos [?]: 77 [0], given: 3

Re: x > 1 and y > 1 [#permalink]  15 Jun 2018, 05:30
Carcass wrote:
$$x > 1$$ and $$y > 1$$

 Quantity A Quantity B $$\frac{1}{\frac{1}{x} + \frac{1}{y}}$$ $$\frac{1}{x} + \frac{1}{y}$$

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

We have to be careful while solving such questions,

it is given that x>1 and y>1, but nothing about them but only +ve i.e. x and y can be integers or some numbers.

When x and y = 2 (integer)

Then col A : 1 / (1/2+ 1/2) = 1
col B : 1/2 + 1/2 = 1.

both same.

When x and y are some number , let both be 2.5.

then Col A : 2.5/2 = 1.25
Col B : 2/2.5 => 0.8 then A > B.

We have different relationships, so D.
Intern
Joined: 10 Oct 2017
Posts: 10
Followers: 0

Kudos [?]: 3 [0], given: 0

Re: x > 1 and y > 1 [#permalink]  24 Sep 2018, 19:52
input values like 3 and can be solved easily
Re: x > 1 and y > 1   [#permalink] 24 Sep 2018, 19:52
Display posts from previous: Sort by