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

It is currently 21 Oct 2019, 23:11

Close

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
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.

Close

Request Expert Reply

Confirm Cancel

What is the tens digit of the three-digit positive integer n

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Intern
Intern
User avatar
S
Joined: 05 Oct 2017
Posts: 43
Location: Bangladesh
Concentration: Accounting, Social Entrepreneurship
What is the tens digit of the three-digit positive integer n  [#permalink]

Show Tags

New post 29 Jan 2019, 03:59
1
3
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

63% (02:00) correct 37% (02:04) wrong based on 66 sessions

HideShow timer Statistics

What is the tens digit of the three-digit positive integer n?

(1) The tens digit of (n+5) is 5.

(2) The tens digit of n is less than the tens digit of 10n

Posted from my mobile device

_________________
.... You are already NAKED. There is NO reason not to FOLLOW your heart.
CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2978
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
What is the tens digit of the three-digit positive integer n  [#permalink]

Show Tags

New post Updated on: 29 Jan 2019, 04:44
1
1
rashedBhai wrote:
What is the tens digit of the three-digit positive integer n?

(1) The tens digit of (n+5) is 5.

(2) The tens digit of n is less than the tens digit of 10n

Posted from my mobile device


Question: What is the tens digit of the three-digit positive integer n?

Statement 1: The tens digit of (n+5) is 5.

by adding 5 in any number the ten's digit may change (if unit digit is greater than 4) or may remain same (if unit digit of number is less than 5) hence, the ten's digit of n may be 5 or 4 based on unit digit

since we have multiple values hence

NOT SUFFICIENT

Statement 2: The tens digit of n is less than the tens digit of 10n

i.e. ten's digit of n is less than the unit digit of n (because by multiplying 10 in the number, the unit digit of number shifts to the tens place of result)

NOT SUFFICIENT

Combining the two statements

ten's digit of n (which may be either 4 or 5) is less than unit's digit of n
i.e. unit digit of n is may vary from 5 to 9
in every case, adding 5 in n will change the ten's digit of number which becomes 5 after addition of 5 in n hence
ten's digit of n = 5-1 = 4

SUFFICIENT

Answer: Option C
_________________
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

Originally posted by GMATinsight on 29 Jan 2019, 04:12.
Last edited by GMATinsight on 29 Jan 2019, 04:44, edited 1 time in total.
GMAT Club Legend
GMAT Club Legend
User avatar
D
Joined: 18 Aug 2017
Posts: 5027
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
What is the tens digit of the three-digit positive integer n  [#permalink]

Show Tags

New post Updated on: 29 Jan 2019, 04:32
rashedBhai wrote:
What is the tens digit of the three-digit positive integer n?

(1) The tens digit of (n+5) is 5.

(2) The tens digit of n is less than the tens digit of 10n

Posted from my mobile device



from the given info
we know n= 100a+10b+c
3 digit no
#1
tens digit n+5 is 5
so n can be 145,146,147,148,149 ; addition of 5 would given tens digit as 5
also when 150,151,152,153,154 ; addition of 5 would given tens digit as 5
in sufficient

#2
tens digit of n < 10n , tens digit
not sufficient

from 1& 2
we can say that value of n would be from 145-149 and tens digit would be 4 ...
IMO C sufficient

Originally posted by Archit3110 on 29 Jan 2019, 04:29.
Last edited by Archit3110 on 29 Jan 2019, 04:32, edited 1 time in total.
GMAT Club Legend
GMAT Club Legend
User avatar
D
Joined: 18 Aug 2017
Posts: 5027
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
What is the tens digit of the three-digit positive integer n  [#permalink]

Show Tags

New post 29 Jan 2019, 04:31
GMATinsight wrote:
rashedBhai wrote:
What is the tens digit of the three-digit positive integer n?

(1) The tens digit of (n+5) is 5.

(2) The tens digit of n is less than the tens digit of 10n

Posted from my mobile device


Question: What is the tens digit of the three-digit positive integer n?

Statement 1: The tens digit of (n+5) is 5.

by adding 5 in any number the ten's digit may change (if unit digit is greater than 4) or may remain same (if unit digit of number is less than 5) hence, the ten's digit of n may be 5 or 4 based on unit digit

since we have multiple values hence

NOT SUFFICIENT

Statement 2: The tens digit of n is less than the tens digit of 10n

i.e. ten's digit of n is less than the unit digit of n (because by multiplying 10 in the number, the unit digit of number shifts to the tens place of result)

NOT SUFFICIENT

Combining the two statements

ten's digit of n (which may be either 4 or 5) is less than unit's digit of n
i.e. unit digit of n is may vary from 1 to 4
in every case, adding 5 in n will NOT change the ten's digit of number hence
ten's digit of n = 5

SUFFICIENT

Answer: Option C

GMATinsight:
sir , quoting your line :
ten's digit of n (which may be either 4 or 5) is less than unit's digit of n
i.e. unit digit of n is may vary from 1 to 4
in every case, adding 5 in n will NOT change the ten's digit of number hence
ten's digit of n = 5


wont the value of n be in range from 145-149 ; tens digit would be 4..
CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2978
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: What is the tens digit of the three-digit positive integer n  [#permalink]

Show Tags

New post 29 Jan 2019, 04:45
Archit3110 wrote:
GMATinsight wrote:
rashedBhai wrote:
What is the tens digit of the three-digit positive integer n?

(1) The tens digit of (n+5) is 5.

(2) The tens digit of n is less than the tens digit of 10n

Posted from my mobile device


Question: What is the tens digit of the three-digit positive integer n?

Statement 1: The tens digit of (n+5) is 5.

by adding 5 in any number the ten's digit may change (if unit digit is greater than 4) or may remain same (if unit digit of number is less than 5) hence, the ten's digit of n may be 5 or 4 based on unit digit

since we have multiple values hence

NOT SUFFICIENT

Statement 2: The tens digit of n is less than the tens digit of 10n

i.e. ten's digit of n is less than the unit digit of n (because by multiplying 10 in the number, the unit digit of number shifts to the tens place of result)

NOT SUFFICIENT

Combining the two statements

ten's digit of n (which may be either 4 or 5) is less than unit's digit of n
i.e. unit digit of n is may vary from 1 to 4
in every case, adding 5 in n will NOT change the ten's digit of number hence
ten's digit of n = 5

SUFFICIENT

Answer: Option C

GMATinsight:
sir , quoting your line :
ten's digit of n (which may be either 4 or 5) is less than unit's digit of n
i.e. unit digit of n is may vary from 1 to 4
in every case, adding 5 in n will NOT change the ten's digit of number hence
ten's digit of n = 5


wont the value of n be in range from 145-149 ; tens digit would be 4..



Archit3110

You are right... made silly error... I have made the correction now... :)

Thank you
_________________
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
GMAT Club Bot
Re: What is the tens digit of the three-digit positive integer n   [#permalink] 29 Jan 2019, 04:45
Display posts from previous: Sort by

What is the tens digit of the three-digit positive integer n

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne