GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 23 Jan 2020, 03:13

### 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

# Is the two-digit prime number s equal to 19?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 60625
Is the two-digit prime number s equal to 19?  [#permalink]

### Show Tags

01 Nov 2019, 08:00
00:00

Difficulty:

45% (medium)

Question Stats:

62% (01:35) correct 38% (01:32) wrong based on 67 sessions

### HideShow timer Statistics

Is the two-digit prime number s equal to 19?

(1) The sum of the digits of s is 10.
(2) The positive difference between the tens and units digits of s is 8.

Are You Up For the Challenge: 700 Level Questions

_________________
Math Expert
Joined: 02 Aug 2009
Posts: 8335
Re: Is the two-digit prime number s equal to 19?  [#permalink]

### Show Tags

01 Nov 2019, 08:08
Is the two-digit prime number s equal to 19?

So the number is
(a) 2-digit
(b) Prime

(1) The sum of the digits of s is 10.
So s can be 19, 37, 73 ...

(2) The positive difference between the tens and units digits of s is 8.
the numbers with difference of 8 can be ONLY 19, 91, 80..
But s is prime, so only possibility is 19..
Suff

B
_________________
VP
Joined: 20 Jul 2017
Posts: 1251
Location: India
Concentration: Entrepreneurship, Marketing
WE: Education (Education)
Re: Is the two-digit prime number s equal to 19?  [#permalink]

### Show Tags

01 Nov 2019, 08:42
Bunuel wrote:
Is the two-digit prime number s equal to 19?

(1) The sum of the digits of s is 10.
(2) The positive difference between the tens and units digits of s is 8.

Are You Up For the Challenge: 700 Level Questions

(1) The sum of the digits of s is 10.
--> Possible values of s = {19, 37, 73} --> Insufficient

(2) The positive difference between the tens and units digits of s is 8.
--> Possible value of s = 19 --> Sufficient

IMO Option B
VP
Joined: 20 Jul 2017
Posts: 1251
Location: India
Concentration: Entrepreneurship, Marketing
WE: Education (Education)
Re: Is the two-digit prime number s equal to 19?  [#permalink]

### Show Tags

01 Nov 2019, 09:05
chetan2u wrote:
Is the two-digit prime number s equal to 19?

So the number is
(a) 2-digit
(b) Prime

(1) The sum of the digits of s is 10.
So s can be 19, 37, 73 ...

(2) The positive difference between the tens and units digits of s is 8.
the numbers with difference of 8 can be ONLY 19, 91, 80..
But s is prime, so only possibility is 19..
Suff

B

Hi chetan2u,

See the highlighted part, the questions says that 's' is a prime number, Is there need to consider non-prime numbers?
Correct me if i'm wrong

Regards
Math Expert
Joined: 02 Aug 2009
Posts: 8335
Re: Is the two-digit prime number s equal to 19?  [#permalink]

### Show Tags

01 Nov 2019, 09:15
1
Dillesh4096 wrote:
chetan2u wrote:
Is the two-digit prime number s equal to 19?

So the number is
(a) 2-digit
(b) Prime

(1) The sum of the digits of s is 10.
So s can be 19, 37, 73 ...

(2) The positive difference between the tens and units digits of s is 8.
the numbers with difference of 8 can be ONLY 19, 91, 80..
But s is prime, so only possibility is 19..
Suff

B

Hi chetan2u,

See the highlighted part, the questions says that 's' is a prime number, Is there need to consider non-prime numbers?
Correct me if i'm wrong

Regards

Hi

Yes we don’t have to consider and that is why I have written that numbers and not s with difference of 8 are19,91 and 80. Bit since s is prime it cannot be 91 or 80 and s is 19
_________________
Re: Is the two-digit prime number s equal to 19?   [#permalink] 01 Nov 2019, 09:15
Display posts from previous: Sort by