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.
It appears that you are browsing the GMAT Club forum unregistered!
Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club
Registration gives you:
Tests
Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.
Applicant Stats
View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more
Books/Downloads
Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Re: What is the value of the two-digit positive integer n? [#permalink]
18 Mar 2013, 02:05
11
This post received KUDOS
Expert's post
2
This post was BOOKMARKED
alex1233 wrote:
What is the value of the two-digit positive integer n?
(1) When n is divided by 5, the remainder is equal to the tens digit of n.
(2) When n is divided by 9, the remainder is equal to the tens digit of n.
Any help on this one would be much appreciated! Thanks
Let's take each statement at a time.
(1) When n is divided by 5, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 5 - say 15. The remainder should be 1 so say n = 16. Think of another number which is divisible by 5 - say 25. The remainder should be 2 so say n = 27 There will be more such numbers so we can see that this is certainly not sufficient.
(2) When n is divided by 9, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 9 - say 18. The remainder should be 1 so say n = 19. Think of another number which is divisible by 9 - say 27. The remainder should be 2 so say n = 29 There will be more such numbers so we can see that this is certainly not sufficient.
What do we do when we consider both statements together? We need to think of a number divisible by both 5 and 9, say 45 (their LCM). The remainder should be 4 so add 4 to 45 to get n = 49 Think of another number divisible by both which will be the next multiple of 45 i.e. 90. The remainder should be 9 but when we divide a number by 5, the remainder cannot be greater than 4. So n cannot be 99. Hence, there is only one such two digit number i.e. n = 49.
Re: What is the value of the two-digit positive integer n? [#permalink]
18 Mar 2013, 11:21
clearly statement 1 leads to many options and same to statement 2
now taking both the statements together.
it should be a no. which is common multiple of both 5 and 9 and also is 2 digit no. which has 10th place digit as reminder... we have 9x5=45 so for reminder to be 4 the no. should be 49, which gives us reminder as 4. no other no. satisfies all the criteria mentioned in question.
clearly option C is answer _________________
giving kudos is the best thing you can do for me..
Re: What is the value of the two-digit positive integer n? [#permalink]
27 Jun 2013, 05:38
2
This post received KUDOS
alex1233 wrote:
What is the value of the two-digit positive integer n?
(1) When n is divided by 5, the remainder is equal to the tens digit of n.
(2) When n is divided by 9, the remainder is equal to the tens digit of n.
Any help on this one would be much appreciated! Thanks
we really dont need any calculation in this question. This is quite conceptual. we know remainder of any number when divided by 5 can only be 1,2,3 or 4.
Its given remainder equals to tens digit. we'll take the four remainders one by one.
1 >> we know tens digit should be 1 so number could only be 11 OR 16. 2 >> we know tens digit should be 2 so number could only be 22 OR 27 3 >> we know tens digit should be 3 so number could only be 33 OR 38. 4 >> we know tens digit should be 4 so number could only be 44 OR 49.
we cant get an answer from st. 1.
we can do same reasoning for st. 2 1 >> 10,19 2 >> 20,29 3 >> 30,39 4 >> 40,49 .... so on .. also no point going forward. we found a match from st. 1(and in st. 1 we wrote all the possible outcomes, so possibility of another such no. is zero) .. the no. is 49.
Re: What is the value of the two-digit positive integer n? [#permalink]
15 Feb 2014, 15:30
VeritasPrepKarishma wrote:
alex1233 wrote:
What is the value of the two-digit positive integer n?
(1) When n is divided by 5, the remainder is equal to the tens digit of n.
(2) When n is divided by 9, the remainder is equal to the tens digit of n.
Any help on this one would be much appreciated! Thanks
Let's take each statement at a time.
(1) When n is divided by 5, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 5 - say 15. The remainder should be 1 so say n = 16. Think of another number which is divisible by 5 - say 25. The remainder should be 2 so say n = 27 There will be more such numbers so we can see that this is certainly not sufficient.
(2) When n is divided by 9, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 9 - say 18. The remainder should be 1 so say n = 19. Think of another number which is divisible by 9 - say 27. The remainder should be 2 so say n = 29 There will be more such numbers so we can see that this is certainly not sufficient.
What do we do when we consider both statements together? We need to think of a number divisible by both 5 and 9, say 45 (their LCM). The remainder should be 4 so add 4 to 45 to get n = 49 Think of another number divisible by both which will be the next multiple of 45 i.e. 90. The remainder should be 9 but when we divide a number by 5, the remainder cannot be greater than 4. So n cannot be 99. Hence, there is only one such two digit number i.e. n = 49.
Answer (C)
Hi Karishma,
I'm a bit stucked with both statements together. How do you know that the remainder has to be 4 and not 1,2 or 3?
Re: What is the value of the two-digit positive integer n? [#permalink]
16 Feb 2014, 19:55
Expert's post
1
This post was BOOKMARKED
jlgdr wrote:
VeritasPrepKarishma wrote:
alex1233 wrote:
What is the value of the two-digit positive integer n?
(1) When n is divided by 5, the remainder is equal to the tens digit of n.
(2) When n is divided by 9, the remainder is equal to the tens digit of n.
Any help on this one would be much appreciated! Thanks
Let's take each statement at a time.
(1) When n is divided by 5, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 5 - say 15. The remainder should be 1 so say n = 16. Think of another number which is divisible by 5 - say 25. The remainder should be 2 so say n = 27 There will be more such numbers so we can see that this is certainly not sufficient.
(2) When n is divided by 9, the remainder is equal to the tens digit of n. Think of a two digit number which is divisible by 9 - say 18. The remainder should be 1 so say n = 19. Think of another number which is divisible by 9 - say 27. The remainder should be 2 so say n = 29 There will be more such numbers so we can see that this is certainly not sufficient.
What do we do when we consider both statements together? We need to think of a number divisible by both 5 and 9, say 45 (their LCM). The remainder should be 4 so add 4 to 45 to get n = 49 Think of another number divisible by both which will be the next multiple of 45 i.e. 90. The remainder should be 9 but when we divide a number by 5, the remainder cannot be greater than 4. So n cannot be 99. Hence, there is only one such two digit number i.e. n = 49.
Answer (C)
Hi Karishma,
I'm a bit stucked with both statements together. How do you know that the remainder has to be 4 and not 1,2 or 3?
Could you please elaborate on this?
Many thanks! Cheers J
The tens digit of 45 is 4. 45 is the first positive two digit number which is divisible by both 5 and 9. So when n is divided by 5 or 9, the remainder should be 4 so n should be 49. The remainder will be 4 which is the tens digit of 49. _________________
Re: What is the value of the two-digit positive integer n? [#permalink]
16 Sep 2015, 08:54
Hello from the GMAT Club BumpBot!
Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________
The “3 golden nuggets” of MBA admission process With ten years of experience helping prospective students with MBA admissions and career progression, I will be writing this blog through...
You know what’s worse than getting a ding at one of your dreams schools . Yes its getting that horrid wait-listed email . This limbo is frustrating as hell . Somewhere...