Last visit was: 23 Apr 2026, 15:33 It is currently 23 Apr 2026, 15:33
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 23 Apr 2026
Posts: 109,785
Own Kudos:
810,861
 [1]
Given Kudos: 105,853
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,785
Kudos: 810,861
 [1]
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 13 Apr 2018, 01:16
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

25% (medium)

Question Stats:

74% (01:04) correct 26% (00:52) wrong based on 63 sessions

History

Date
Time
Result
Not Attempted Yet
If p is a prime number, what is the value of p?

(1) 10 < p - 3 < 16
(2) p^2 = 289
ShowHide Answer
Official Answer
D
User avatar
KSBGC
User avatar
Joined: 31 Oct 2013
Last visit: 10 Mar 2022
Posts: 1,240
Own Kudos:
1,509
Given Kudos: 635
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Posts: 1,240
Kudos: 1,509
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 Updated on: 18 Apr 2018, 16:26
Originally posted by KSBGC on 13 Apr 2018, 01:27.
Last edited by KSBGC on 18 Apr 2018, 16:26, edited 1 time in total.
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
If p is a prime number, what is the value of p?

(1) 10 < p - 3 < 16
(2) p^2 = 289
Show more

p is a prime no.

statement 1: 10<p-3<16
=10+3<p-3+3<16+3 ( by adding 3)
=13<p<19
we get the perfect range here. the only prime between 13 and 19 is 17. sufficient.

statement 2: P^2=289. we know that (+-)17^2=289.
since 289 is the result of a perfect square p could be negative or positive. but it is mentioned that p is a prime. thus p is +17.

The correct answer is D.
User avatar
benejo
User avatar
Joined: 17 Jan 2017
Last visit: 30 Jun 2018
Posts: 46
Own Kudos:
140
Given Kudos: 4
Posts: 46
Kudos: 140
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 13 Apr 2018, 01:32
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
If p is a prime number, what is the value of p?

(1) 10 < p - 3 < 16
(2) p^2 = 289
Show more

(1) Only prime in the range is 17.
(2) 17^2 = 289

Answer (D)
User avatar
US09
User avatar
Joined: 15 Oct 2017
Last visit: 06 Apr 2021
Posts: 242
Own Kudos:
313
Given Kudos: 338
GMAT 1: 560 Q42 V25
GMAT 2: 570 Q43 V27
GMAT 3: 710 Q49 V39
Products:
My Reviews
GMAT 3: 710 Q49 V39
Posts: 242
Kudos: 313
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 14 Apr 2018, 11:21
Kudos
Add Kudos
Bookmarks
Bookmark this Post
IMO D.

1) Straightaway p=17. Sufficient.
2) P=+/-17, but it is given that p is a prime number and prime numbers are not negative. Therefore, p=17. Sufficient.
User avatar
Mo2men
User avatar
Joined: 26 Mar 2013
Last visit: 09 May 2023
Posts: 2,426
Own Kudos:
1,508
 [1]
Given Kudos: 641
Concentration: Operations, Strategy
Schools: Erasmus (II)
Products:
My Reviews
Schools: Erasmus (II)
Posts: 2,426
Kudos: 1,508
 [1]
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 14 Apr 2018, 11:41
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
selim
Bunuel
If p is a prime number, what is the value of p?

(1) 10 < p - 3 < 16
(2) p^2 = 289

p is a prime no.

statement 1: 10<p-3<16
=10+3<p-3+3<16+3 ( by adding 3)
=13<p<19
we get the perfect range here. the only prime between 13 and 19 is 17. sufficient.

statement 2: P^2=289. we know that (+-)17^2=289.
since 289 is the result of a perfect square p could be negative or positive. not sufficient.

The correct answer is A.
Show more

As stated in question stem that p is prime, so statement 2 is sufficient as 17 is the only prime.
User avatar
KSBGC
User avatar
Joined: 31 Oct 2013
Last visit: 10 Mar 2022
Posts: 1,240
Own Kudos:
1,509
Given Kudos: 635
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Posts: 1,240
Kudos: 1,509
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 14 Apr 2018, 12:24
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Mo2men
selim
Bunuel
If p is a prime number, what is the value of p?

(1) 10 < p - 3 < 16
(2) p^2 = 289

p is a prime no.

statement 1: 10<p-3<16
=10+3<p-3+3<16+3 ( by adding 3)
=13<p<19
we get the perfect range here. the only prime between 13 and 19 is 17. sufficient.

statement 2: P^2=289. we know that (+-)17^2=289.
since 289 is the result of a perfect square p could be negative or positive. not sufficient.

The correct answer is A.

As stated in question stem that p is prime, so statement 2 is sufficient as 17 is the only prime.
Show more

as far as i know prime can't be negative. Thus statement 2 is not sufficient. in statement 2 we have both positive and negative value for p.
User avatar
Mo2men
User avatar
Joined: 26 Mar 2013
Last visit: 09 May 2023
Posts: 2,426
Own Kudos:
1,508
Given Kudos: 641
Concentration: Operations, Strategy
Schools: Erasmus (II)
Products:
My Reviews
Schools: Erasmus (II)
Posts: 2,426
Kudos: 1,508
If p is a prime number, what is the value of p? (1) 10 < p - 3 < 16 14 Apr 2018, 12:42
Kudos
Add Kudos
Bookmarks
Bookmark this Post
selim


As stated in question stem that p is prime, so statement 2 is sufficient as 17 is the only prime.
Show more

You are totally right but the question stated, 'If p is a prime number,...' so it is for certain p is prime. The statement 2 gives you 2 solution one is prime and other is not. So pick the prime one. It is the same problem when you see 'if x is positive....., what is value of x? Here , Statement 2 gives you 17 & -17 but it is sufficient because it is stated that x is positive.

If the question does not state that prime, then statement 2 is insufficient.

According the question p is prime, but statement 2 gives you, for example, 2 solutions 13 & 17, then statement 2 is insufficient.

I hope it helps
Moderators:
Bunuel
Math Expert
109785 posts
kingbucky
498 posts
Gmat860sanskar
212 posts