It is currently 19 Sep 2017, 05:10

### 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

# What is the value of the integer z ?

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 24 Jun 2012
Posts: 278

Kudos [?]: 70 [0], given: 251

Location: Pakistan
GPA: 3.76
What is the value of the integer z ? [#permalink]

### Show Tags

02 Aug 2017, 10:54
00:00

Difficulty:

45% (medium)

Question Stats:

58% (01:06) correct 42% (01:02) wrong based on 26 sessions

### HideShow timer Statistics

What is the value of the integer z ?

(1) z has exactly one prime factor.
(2) 18 < z < 32, and z has exactly three factors.
[Reveal] Spoiler: OA

_________________

Push yourself again and again. Don't give an inch until the final buzzer sounds. -Larry Bird
Success isn't something that just happens - success is learned, success is practiced and then it is shared. -Sparky Anderson
-S

Kudos [?]: 70 [0], given: 251

Senior Manager
Joined: 06 Jul 2016
Posts: 413

Kudos [?]: 112 [0], given: 99

Location: Singapore
Concentration: Strategy, Finance
What is the value of the integer z ? [#permalink]

### Show Tags

02 Aug 2017, 10:59
sananoor wrote:
What is the value of the integer z ?

(1) z has exactly one prime factor.
(2) 18 < z < 32, and z has exactly three factors.

Error in my solution for statement 2. Anyone looking for a solution, look for the solution right below my post. It corrects my oversight!

1) z = $$p^a$$ where p is prime.
z = 2 or $$2^2$$ or 3 or some other prime factor.
Insufficient.

2) 18 < z < 32
z = 2*3*5 = 30
Sufficient.

_________________

Put in the work, and that dream score is yours!

Last edited by akshayk on 02 Aug 2017, 11:40, edited 1 time in total.

Kudos [?]: 112 [0], given: 99

Intern
Joined: 06 Sep 2013
Posts: 32

Kudos [?]: 18 [0], given: 284

Location: India
GMAT 1: 770 Q50 V44
GPA: 3.85
WE: Information Technology (Consulting)
What is the value of the integer z ? [#permalink]

### Show Tags

02 Aug 2017, 11:29
sananoor wrote:
What is the value of the integer z ?

(1) z has exactly one prime factor.
(2) 18 < z < 32, and z has exactly three factors.

1) All the prime numbers have exactly one prime factor. NOT SUFFICIENT

2) Only a square of prime number(say x^2) can have exactly 3 prime factors. They will be 1,x and x^2.
Between 18 and 32, only number which satisfies this is 25(5^2). SUFFICIENT

Hence B

30 has the following factors
1,2,3,5,6,10,15,30
(Note that option 2 doesn't state that the three factors are prime factors.)

Kudos [?]: 18 [0], given: 284

Intern
Joined: 06 Sep 2013
Posts: 32

Kudos [?]: 18 [1], given: 284

Location: India
GMAT 1: 770 Q50 V44
GPA: 3.85
WE: Information Technology (Consulting)
Re: What is the value of the integer z ? [#permalink]

### Show Tags

02 Aug 2017, 11:32
1
KUDOS
akshayk wrote:
sananoor wrote:
What is the value of the integer z ?

(1) z has exactly one prime factor.
(2) 18 < z < 32, and z has exactly three factors.

1) z = $$p^a$$ where p is prime.
z = 2 or $$2^2$$ or 3 or some other prime factor.
Insufficient.

2) 18 < z < 32
z = 2*3*5 = 30
Sufficient.

Option 2 doesn't mention that the three factors are prime factors. so only 25 satisfies the condition.
Also factors of 30 include 1,2,3,5,6,10,15,30.

Kudos [?]: 18 [1], given: 284

Senior Manager
Joined: 06 Jul 2016
Posts: 413

Kudos [?]: 112 [0], given: 99

Location: Singapore
Concentration: Strategy, Finance
Re: What is the value of the integer z ? [#permalink]

### Show Tags

02 Aug 2017, 11:37
Thanks for pointing out my oversight mate!

Posted from my mobile device

Posted from my mobile device
_________________

Put in the work, and that dream score is yours!

Kudos [?]: 112 [0], given: 99

Re: What is the value of the integer z ?   [#permalink] 02 Aug 2017, 11:37
Similar topics Replies Last post
Similar
Topics:
6 If 2xy + z = 9, what is the value of the positive integer z? 9 15 Oct 2013, 07:50
35 If z is a three-digit positive integer, what is the value of 7 11 Sep 2016, 00:25
5 What is the value of integer z? 5 08 Jul 2015, 03:26
11 What is the value of integer z? 10 31 May 2016, 00:50
19 What is the value of integer z? 15 08 Jul 2016, 13:29
Display posts from previous: Sort by