It is currently 17 Oct 2017, 10:30

### 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

# How many multiples of 10 are there between 1000 and 2000, inclusive?

Author Message
TAGS:

### Hide Tags

Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 615

Kudos [?]: 1133 [0], given: 39

How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

12 Aug 2010, 09:27
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

83% (00:25) correct 17% (00:16) wrong based on 16 sessions

### HideShow timer Statistics

How many multiples of 10 are there between 1000 and 2000, inclusive?

OA:
[Reveal] Spoiler:
101

_________________

Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Kudos [?]: 1133 [0], given: 39

Math Expert
Joined: 02 Sep 2009
Posts: 41873

Kudos [?]: 128564 [0], given: 12180

Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

12 Aug 2010, 09:44
Expert's post
1
This post was
BOOKMARKED
Baten80 wrote:
How many multiples of 10 are there between 1000 and 2000, inclusive?

Let me to know the calculation process.
Ans.101

Hi, and welcome to Gmat Club! Below is a solution for your problem:

$$# \ of \ multiples \ of \ x \ in \ the \ range = \frac{Last \ multiple \ of \ x \ in \ the \ range \ - \ First \ multiple \ of \ x \ in \ the \ range}{x}+1$$.

For our original question we would have: $$\frac{2,000-1,000}{10}+1=101$$.

Check this: totally-basic-94862.html?hilit=last%20first%20range%20multiple

Hope it helps.
_________________

Kudos [?]: 128564 [0], given: 12180

Senior Manager
Status: Time to step up the tempo
Joined: 24 Jun 2010
Posts: 404

Kudos [?]: 247 [1], given: 50

Location: Milky way
Schools: ISB, Tepper - CMU, Chicago Booth, LSB
Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

12 Aug 2010, 09:47
1
KUDOS
My attempt:

1000 - 1100 -- 11
1110 - 1200 -- 10
1210 - 1300 -- 10

1X10 - 1(X+1)00 -- 10

X - 3, 4, 5, 6 ,7 ,8, 9.

Sum them up - 101.
_________________

Support GMAT Club by putting a GMAT Club badge on your blog

Kudos [?]: 247 [1], given: 50

Senior Manager
Status: Fighting on
Joined: 14 Mar 2010
Posts: 311

Kudos [?]: 30 [0], given: 3

Schools: UCLA (R1 interview-WL), UNC(R2--interview-ding) Oxford(R2-Admit), Kelley (R2- Admit ), McCombs(R2)
WE 1: SE - 1
WE 2: Engineer - 3
Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

12 Aug 2010, 11:27
In general the formula for any series where "d" is the increment or difference between two terms to find the nth term =
An= A1+ (n-1)d
Now we know An =2000
A1=1000
d=10
2000=1000+(n-1)10
=101

OR
Use this
( last -first )/ increment + 1

Posted from my mobile device

Kudos [?]: 30 [0], given: 3

GRE Forum Moderator
Affiliations: PMP certified, IT professional
Joined: 21 Jun 2010
Posts: 216

Kudos [?]: 151 [0], given: 2

Location: USA
Schools: CMU, Kelley
Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

14 Aug 2010, 09:44
As already discussed, the method is [(Last-First)/Increment ]+1

If you are refering to mgmat by any chance, this is discussed in Chap4 of Number properties

Kudos [?]: 151 [0], given: 2

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 16762

Kudos [?]: 273 [0], given: 0

Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

18 Nov 2015, 09:42
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.
_________________

Kudos [?]: 273 [0], given: 0

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 16762

Kudos [?]: 273 [0], given: 0

Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

10 Mar 2017, 10:39
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.
_________________

Kudos [?]: 273 [0], given: 0

Intern
Joined: 30 Jun 2017
Posts: 18

Kudos [?]: 7 [0], given: 80

Location: India
Concentration: Technology, General Management
WE: Consulting (Computer Software)
Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

06 Sep 2017, 22:57
Bunuel wrote:
Baten80 wrote:
How many multiples of 10 are there between 1000 and 2000, inclusive?

Let me to know the calculation process.
Ans.101

Hi, and welcome to Gmat Club! Below is a solution for your problem:

$$# \ of \ multiples \ of \ x \ in \ the \ range = \frac{Last \ multiple \ of \ x \ in \ the \ range \ - \ First \ multiple \ of \ x \ in \ the \ range}{x}+1$$.

For our original question we would have: $$\frac{2,000-1,000}{10}+1=101$$.

Check this: http://gmatclub.com/forum/totally-basic ... 20multiple

Hope it helps.

Hi Bunuel, Thanks for the explanation. However, if the question would have been that how many multiples of 5 are there between -7 and 37, inclusive? Will we consider the last number to be 35 and the first number to be -5?

Kudos [?]: 7 [0], given: 80

Math Expert
Joined: 02 Sep 2009
Posts: 41873

Kudos [?]: 128564 [0], given: 12180

Re: How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

06 Sep 2017, 23:07
SinhaS wrote:
Bunuel wrote:
Baten80 wrote:
How many multiples of 10 are there between 1000 and 2000, inclusive?

Let me to know the calculation process.
Ans.101

Hi, and welcome to Gmat Club! Below is a solution for your problem:

$$# \ of \ multiples \ of \ x \ in \ the \ range = \frac{Last \ multiple \ of \ x \ in \ the \ range \ - \ First \ multiple \ of \ x \ in \ the \ range}{x}+1$$.

For our original question we would have: $$\frac{2,000-1,000}{10}+1=101$$.

Check this: http://gmatclub.com/forum/totally-basic ... 20multiple

Hope it helps.

Hi Bunuel, Thanks for the explanation. However, if the question would have been that how many multiples of 5 are there between -7 and 37, inclusive? Will we consider the last number to be 35 and the first number to be -5?

How many multiples of 5 are there between -7 and 37, inclusive?

The first multiple is -5 and the last multiple is 35, so the answer is (35 - (-5))/5 + 1 = 9:
-5, 0, 5, 10, 15, 20, 25, 30 and 35.
_________________

Kudos [?]: 128564 [0], given: 12180

Intern
Joined: 30 Jun 2017
Posts: 18

Kudos [?]: 7 [0], given: 80

Location: India
Concentration: Technology, General Management
WE: Consulting (Computer Software)
How many multiples of 10 are there between 1000 and 2000, inclusive? [#permalink]

### Show Tags

06 Sep 2017, 23:11
Bunuel wrote:
SinhaS wrote:
How many multiples of 10 are there between 1000 and 2000, inclusive?

Let me to know the calculation process.
Ans.101

Hi, and welcome to Gmat Club! Below is a solution for your problem:

$$# \ of \ multiples \ of \ x \ in \ the \ range = \frac{Last \ multiple \ of \ x \ in \ the \ range \ - \ First \ multiple \ of \ x \ in \ the \ range}{x}+1$$.

For our original question we would have: $$\frac{2,000-1,000}{10}+1=101$$.

Check this: http://gmatclub.com/forum/totally-basic ... 20multiple

Hope it helps.

Hi Bunuel, Thanks for the explanation. However, if the question would have been that how many multiples of 5 are there between -7 and 37, inclusive? Will we consider the last number to be 35 and the first number to be -5?

How many multiples of 5 are there between -7 and 37, inclusive?

The first multiple is -5 and the last multiple is 35, so the answer is (35 - (-5))/5 + 1 = 9:
-5, 0, 5, 10, 15, 20, 25, 30 and 35.

Thanks. I got it right. Now it's clear.

Kudos [?]: 7 [0], given: 80

How many multiples of 10 are there between 1000 and 2000, inclusive?   [#permalink] 06 Sep 2017, 23:11
Display posts from previous: Sort by