Find all School-related info fast with the new School-Specific MBA Forum

It is currently 23 Apr 2014, 06:43

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If n is a positive integer, what is the tens digit of n ?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Manager
Manager
Joined: 02 Dec 2012
Posts: 178
Followers: 1

Kudos [?]: 35 [1] , given: 0

If n is a positive integer, what is the tens digit of n ? [#permalink] New post 26 Dec 2012, 04:51
1
This post received
KUDOS
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

58% (01:52) correct 41% (01:12) wrong based on 163 sessions
If n is a positive integer, what is the tens digit of n ?

(1) The hundreds digit of 10n is 6.
(2) The tens digit of n + 1 is 7.
[Reveal] Spoiler: OA
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 17375
Followers: 2886

Kudos [?]: 18474 [1] , given: 2359

GMAT Tests User CAT Tests
Re: If n is a positive integer, what is the tens digit of n ? [#permalink] New post 26 Dec 2012, 04:53
1
This post received
KUDOS
Expert's post
If n is a positive integer, what is the tens digit of n ?

(1) The hundreds digit of 10n is 6. This implies that the tens digit of n is 6. Sufficient.

(2) The tens digit of n + 1 is 7. If n=70, then the tens digit of n is 7, but if n=69, then the tens digit of n is 6. Not sufficient.

Answer: A.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 27 Jun 2012
Posts: 416
Followers: 32

Kudos [?]: 276 [1] , given: 180

Re: If n is a positive integer, what is the tens digit of n ? [#permalink] New post 13 Jan 2013, 23:45
1
This post received
KUDOS
fozzzy wrote:
How do you solve this one?


(1) The hundreds digit of 10n is 6
SUFFICIENT: If Hundred's place of 10n = 6 then Ten's place of n must be 6
e.g. n=68 tens place 6,
10n=680, hundreds place is 6

(2) The tens digit of n+1 is 7
INSUFFICIENT: If n=69; n+1=70 OR If n=77; n+1=77; i.e. n can have both 6 or 7 as tens place.

Hence choice(A) is the answer.
_________________

Thanks,
PraPon

VOTE: vote-best-gmat-practice-tests-excluding-gmatprep-144859.html
Tough RCs: Passage1 | Passage2 | Passage3 | Passage4 | Passage5 | Passage6 | Passage7

Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 17375
Followers: 2886

Kudos [?]: 18474 [0], given: 2359

GMAT Tests User CAT Tests
Re: If n is a positive integer, what is the tens digit of n ? [#permalink] New post 20 Aug 2013, 06:49
Expert's post
Re: If n is a positive integer, what is the tens digit of n ?   [#permalink] 20 Aug 2013, 06:49
    Similar topics Author Replies Last post
Similar
Topics:
New posts If n is a positive integer, what is the tens digit of n ? mbassmbass04 2 18 Dec 2004, 16:39
This topic is locked, you cannot edit posts or make further replies. New Experts publish their posts in the topic If n is a positive integer, what is the tens digit of n ? Baten80 4 25 Feb 2011, 04:12
New posts If n is a positive integer, what`s the tens digit of n? 1) Madelaine88 3 12 Mar 2011, 11:16
New posts 3 If n is a positive integer, what is the tens digit of n ? siddhans 8 10 Jun 2011, 23:47
New posts 1 Experts publish their posts in the topic If n is a four-digit positive integer, then what is the tens fozzzy 5 15 Jun 2013, 07:02
Display posts from previous: Sort by

If n is a positive integer, what is the tens digit of n ?

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.