GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 22 Oct 2019, 04:31

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

Is x=3? 1) x^2=9 2) x=y^2/7; y is real

Author Message
TAGS:

Hide Tags

VP
Joined: 23 Feb 2015
Posts: 1263
Is x=3? 1) x^2=9 2) x=y^2/7; y is real  [#permalink]

Show Tags

27 Mar 2019, 01:49
00:00

Difficulty:

55% (hard)

Question Stats:

33% (00:48) correct 67% (00:50) wrong based on 27 sessions

HideShow timer Statistics

Is $$x=3?$$
1) $$x^2=9$$
2) $$x=\frac{y^2}{7}$$; y is real

_________________
“The heights by great men reached and kept were not attained in sudden flight but, they while their companions slept, they were toiling upwards in the night.”

Do you need official questions for Quant?
3700 Unique Official GMAT Quant Questions
------
SEARCH FOR ALL TAGS
GMAT Club Tests
Math Expert
Joined: 02 Aug 2009
Posts: 8006
Re: Is x=3? 1) x^2=9 2) x=y^2/7; y is real  [#permalink]

Show Tags

27 Mar 2019, 09:12
Is $$x=3?$$
1) $$x^2=9$$
2) $$x=\frac{y^2}{7}$$; y is real

Is $$x=3?$$
1) $$x^2=9$$
x can be 3 or -3
insuff

2) $$x=\frac{y^2}{7}$$; y is real
7x=$$y^2$$, so x cannot be negative.
Insuff

Combined
x can be just 3
C
_________________
Manhattan Prep Instructor
Joined: 04 Dec 2015
Posts: 832
GMAT 1: 790 Q51 V49
GRE 1: Q170 V170
Re: Is x=3? 1) x^2=9 2) x=y^2/7; y is real  [#permalink]

Show Tags

27 Mar 2019, 17:59
Is $$x=3?$$
1) $$x^2=9$$
2) $$x=\frac{y^2}{7}$$; y is real

Where did this problem come from? I'm curious because I've never seen anything quite like the second statement in an official problem - although real numbers are tested on the GMAT, I haven't really seen a problem that focused on the properties of real numbers (as opposed to imaginary numbers) in this way.
_________________

Chelsey Cooley | Manhattan Prep | Seattle and Online

My latest GMAT blog posts | Suggestions for blog articles are always welcome!
Re: Is x=3? 1) x^2=9 2) x=y^2/7; y is real   [#permalink] 27 Mar 2019, 17:59
Display posts from previous: Sort by