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

 It is currently 18 Nov 2018, 10:43

### 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 November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### How to QUICKLY Solve GMAT Questions - GMAT Club Chat

November 20, 2018

November 20, 2018

09:00 AM PST

10:00 AM PST

The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
• ### The winning strategy for 700+ on the GMAT

November 20, 2018

November 20, 2018

06:00 PM EST

07:00 PM EST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# The square root of 24336 is exactly

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50627
The square root of 24336 is exactly  [#permalink]

### Show Tags

04 Mar 2018, 22:57
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:19) correct 5% (00:51) wrong based on 64 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: 50627
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: 2701
Location: India
GMAT: INSIGHT
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: 653
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: 2830
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: 379
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: 1303
Location: India
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
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 &nbs [#permalink] 20 Mar 2018, 09:01
Display posts from previous: Sort by