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

 It is currently 04 Jul 2015, 07:34

### 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 June
Open Detailed Calendar

# An integer greater than 1 that is not prime is called

Author Message
TAGS:
Manager
Joined: 19 Nov 2007
Posts: 227
Followers: 1

Kudos [?]: 139 [0], given: 1

An integer greater than 1 that is not prime is called [#permalink]  17 Nov 2009, 23:11
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
An integer greater than 1 that is not prime is called composite. If the two-digit integer n is greater than 20, is n composite?
(1) The tens digit of n is a factor of the units digit of n.
(2) The tens digit of n is 2.
Manager
Joined: 13 Aug 2009
Posts: 203
Schools: Sloan '14 (S)
Followers: 3

Kudos [?]: 82 [0], given: 16

Re: DSCompostite [#permalink]  18 Nov 2009, 00:59
Statement 1:

All numbers between 11 and 19 fit this requirement, but it includes both primes and composites:

Prime: 11, 13, 17, 19
Composite: 12, 14, 15, 16, 18

INSUFFICIENT

Statement 2:

This set includes the numbers between 20 and 29 which also has both primes and composites.

INSUFFICIENT

Statements 1 and 2:

From the numbers between 20 and 29 where the tens digit is a factor of the units digit, we have only composites.

We know this because no even number besides 2 is a prime number:

22,24,26,28

SUFFICIENT

Manager
Joined: 29 Oct 2009
Posts: 211
GMAT 1: 750 Q50 V42
Followers: 78

Kudos [?]: 860 [0], given: 18

Re: DSCompostite [#permalink]  18 Nov 2009, 01:10
Quote:
All numbers between 11 and 19 fit this requirement, but it includes both primes and composites:

Question stem states that n must be greater than 20.

(A) should be sufficient.
_________________

Click below to check out some great tips and tricks to help you deal with problems on Remainders!
compilation-of-tips-and-tricks-to-deal-with-remainders-86714.html#p651942

1) Translating the English to Math : word-problems-made-easy-87346.html

Senior Manager
Joined: 30 Aug 2009
Posts: 286
Location: India
Concentration: General Management
Followers: 3

Kudos [?]: 111 [0], given: 5

Re: DSCompostite [#permalink]  18 Nov 2009, 02:12
An integer greater than 1 that is not prime is called composite. If the two-digit integer n is greater than 20, is n composite?
(1) The tens digit of n is a factor of the units digit of n.
(2) The tens digit of n is 2.

A

1. numbers such as 22 24 36 39 suffice and are composite
Suff
2. we know nothing about units digit. the info will be true for 23 and 24 as well. Hence insuff
Re: DSCompostite   [#permalink] 18 Nov 2009, 02:12
Similar topics Replies Last post
Similar
Topics:
4 An integer grater than 1 that is not prime is called 10 25 Jun 2006, 15:05
An integer greater than 1 that is not prime is called 13 10 Sep 2008, 00:05
An integer greater than 1 that is not prime is called 10 19 Jun 2008, 23:14
13 An integer greater than 1 that is not prime is called 9 08 Jan 2008, 05:20
An integer greater than 1 that is not a prime is called 11 03 May 2006, 14:41
Display posts from previous: Sort by