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

 It is currently 19 Feb 2019, 17:25

### 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

## Events & Promotions

###### Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
• ### Free GMAT Prep Hour

February 20, 2019

February 20, 2019

08:00 PM EST

09:00 PM EST

Strategies and techniques for approaching featured GMAT topics. Wednesday, February 20th at 8 PM EST

February 21, 2019

February 21, 2019

10:00 PM PST

11:00 PM PST

Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.

# The square root of 24336 is exactly

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 52971
The square root of 24336 is exactly  [#permalink]

### Show Tags

04 Mar 2018, 22:57
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:20) correct 5% (00:51) wrong based on 68 sessions

### HideShow timer Statistics

The square root of 24336 is exactly

(A) 152

(B) 153

(C) 155

(D) 156

(E) 158

_________________
Math Expert
Joined: 02 Sep 2009
Posts: 52971
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

04 Mar 2018, 22:58
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2788
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

05 Mar 2018, 03:02
Bunuel wrote:
The square root of 24336 is exactly

(A) 152

(B) 153

(C) 155

(D) 156

(E) 158

The best way of answering such question lies is PRIME FACTORIZATION

$$24336 = 4*6084 = 4^2 * 1521 = 4^2*9*169 = 2^4*3^2*13^2$$

$$\sqrt{24336} = 2^2*3*13 = 156$$

ALTERNATE

Out of all available options, the square of only 156 may have Unit digit 6 which the number 24336 has therefore

_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Director
Joined: 21 May 2013
Posts: 661
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

05 Mar 2018, 03:06
1
Bunuel wrote:
The square root of 24336 is exactly

(A) 152

(B) 153

(C) 155

(D) 156

(E) 158

Only the square of 156 will result in unit's digit of 6
Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2827
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

06 Mar 2018, 10:26
Bunuel wrote:
The square root of 24336 is exactly

(A) 152

(B) 153

(C) 155

(D) 156

(E) 158

We are looking for a number that, when squared, will have a units digit of 6. Of our answer choices only 156 will have a units digit of 6 when it is squared.

_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Senior Manager
Joined: 07 Jul 2012
Posts: 376
Location: India
Concentration: Finance, Accounting
GPA: 3.5
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

06 Mar 2018, 17:45
Square of 6 is 6. So only option D has unit digit as 6.

_________________

Kindly hit kudos if my post helps!

VP
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1400
Location: India
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Real Estate)
Re: The square root of 24336 is exactly  [#permalink]

### Show Tags

20 Mar 2018, 09:01
Bunuel wrote:
The square root of 24336 is exactly

(A) 152

(B) 153

(C) 155

(D) 156

(E) 158

Unit digit of the given number 24336 is 6, therefore we need to find an answer choice which has a unit digit as 6.

Hence (D)
_________________

"Do not watch clock; Do what it does. KEEP GOING."

Re: The square root of 24336 is exactly   [#permalink] 20 Mar 2018, 09:01
Display posts from previous: Sort by