It is currently 11 Dec 2017, 15:51

### 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

# Is the average (arithmetic mean) of 5 different positive

Author Message
TAGS:

### Hide Tags

Director
Joined: 24 Oct 2005
Posts: 572

Kudos [?]: 76 [1], given: 0

Location: NYC
Is the average (arithmetic mean) of 5 different positive [#permalink]

### Show Tags

01 Apr 2006, 16:48
1
KUDOS
5
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

61% (00:35) correct 39% (00:37) wrong based on 253 sessions

### HideShow timer Statistics

Is the average (arithmetic mean) of 5 different positive integers at least 30?

(1) Each of the integers is a multiple of 10
(2) The sum of the 5 integers is 160

My question is, is 0 multiple of 10?

OPEN DISCUSSION OF THIS QUESTION IS HERE: is-the-average-arithmetic-mean-of-5-different-positive-132144.html
[Reveal] Spoiler: OA

_________________

Success is my only option, failure is not -- Eminem

Last edited by Bunuel on 08 Jul 2013, 10:41, edited 1 time in total.
Moved to DS forum, renamed the topic, edited the question and added the OA.

Kudos [?]: 76 [1], given: 0

VP
Joined: 29 Apr 2003
Posts: 1402

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

### Show Tags

01 Apr 2006, 18:15
Yeah 0 is a multiple of all numbers!

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

VP
Joined: 29 Apr 2003
Posts: 1402

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

### Show Tags

01 Apr 2006, 18:16
I wud say that the answer is E!

Whats the oa?

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

VP
Joined: 29 Dec 2005
Posts: 1337

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

### Show Tags

01 Apr 2006, 18:43
bewakoof wrote:
Is the average (arithmetic mean) of 5 different positive integers atleast 30?

1. Each of the integers is a multiple of 10.
2. The sum of 5 integers is 160.
My question is, is 0 multiple of 10?

0 is multiple of all numbers but is not +ve. so we cannot consider it as a +ve multiple of 10 here.

D.
from i, the sum of the five different integers is 150. so the ave is at least 30. suff

from ii, if the sum of 5 numbers is 160, then their average is more than 30. suff.

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

VP
Joined: 29 Apr 2003
Posts: 1402

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

### Show Tags

01 Apr 2006, 18:45
agreed! Missed the +ve Part

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

Manager
Joined: 25 Mar 2006
Posts: 128

Kudos [?]: 1 [0], given: 0

Location: Stonybrook Univ

### Show Tags

01 Apr 2006, 20:45
i also agree with D ... but good rule about 0 i had a DS where that was tested

Kudos [?]: 1 [0], given: 0

Director
Joined: 24 Oct 2005
Posts: 572

Kudos [?]: 76 [0], given: 0

Location: NYC

### Show Tags

02 Apr 2006, 02:14
Thanks.. missed the positive integer part.. thought 0 was the multiple and chose B..

OA is D..

btw. prof.. you rock!!
_________________

Success is my only option, failure is not -- Eminem

Kudos [?]: 76 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5201

Kudos [?]: 439 [0], given: 0

### Show Tags

02 Apr 2006, 02:40
Agree with (D).

he fact that 0 is a multiple of all integers will most likely not be tested on the GMAT.

Kudos [?]: 439 [0], given: 0

VP
Joined: 29 Apr 2003
Posts: 1402

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

### Show Tags

02 Apr 2006, 03:20
This is where thye potentially test for 0 as a multiple of a number

http://www.gmatclub.com/phpbb/viewtopic ... 284#187284

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

Current Student
Joined: 29 Jan 2005
Posts: 5201

Kudos [?]: 439 [0], given: 0

### Show Tags

02 Apr 2006, 03:22
sm176811 wrote:
This is where thye potentially test for 0 as a multiple of a number

http://www.gmatclub.com/phpbb/viewtopic ... 284#187284

Kudos [?]: 439 [0], given: 0

VP
Joined: 29 Apr 2003
Posts: 1402

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

### Show Tags

02 Apr 2006, 03:24
What I meant was that, they do have problems where they use test:
'0 as a multiple of a number'

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

Director
Joined: 19 Mar 2007
Posts: 522

Kudos [?]: 45 [0], given: 0

### Show Tags

25 Apr 2007, 00:34
Why do we say that -

Professor wrote:
from i, the sum of the five different integers is 150. so the ave is at least 30. suff

10 is also multiple of 10. So the minimum will be 10+10+10+10+10 = 50... How do we get 150?

Kudos [?]: 45 [0], given: 0

Director
Joined: 18 Jul 2006
Posts: 523

Kudos [?]: 71 [0], given: 0

### Show Tags

25 Apr 2007, 00:37
nick_sun wrote:
Why do we say that -

Professor wrote:
from i, the sum of the five different integers is 150. so the ave is at least 30. suff

10 is also multiple of 10. So the minimum will be 10+10+10+10+10 = 50... How do we get 150?

"5 different positive integers "....least could be 10, 20, 30, 40, 50

Kudos [?]: 71 [0], given: 0

Director
Joined: 19 Mar 2007
Posts: 522

Kudos [?]: 45 [0], given: 0

### Show Tags

25 Apr 2007, 00:58
Juaz wrote:
nick_sun wrote:
Why do we say that -

Professor wrote:
from i, the sum of the five different integers is 150. so the ave is at least 30. suff

10 is also multiple of 10. So the minimum will be 10+10+10+10+10 = 50... How do we get 150?

"5 different positive integers "....least could be 10, 20, 30, 40, 50

Oh, gosh! It is my silliest mistake Thank you Juaz!

Kudos [?]: 45 [0], given: 0

Senior Manager
Joined: 01 Jan 2007
Posts: 320

Kudos [?]: 25 [0], given: 0

### Show Tags

25 Apr 2007, 02:01
yep its D.

Javed.

Cheers!

Kudos [?]: 25 [0], given: 0

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5032

Kudos [?]: 456 [0], given: 0

Location: Singapore

### Show Tags

25 Apr 2007, 02:22
St1:
If the 5 integers are 10,20,30,40 and 50, then ave = 30. Since this is the smallest valid set of integers, so st1 is sufficient.

St2:
The average is alwasy 32. St2 is sufficient.

Ans D

Kudos [?]: 456 [0], given: 0

Manager
Joined: 25 Aug 2007
Posts: 70

Kudos [?]: 5 [0], given: 0

Schools: HBS '10

### Show Tags

13 Oct 2007, 17:55
I made the mistake of "at least", being different than "greater than"

Where at least means >= 30

But greater than means > 30

Crap!

Kudos [?]: 5 [0], given: 0

Director
Joined: 22 Aug 2007
Posts: 566

Kudos [?]: 79 [0], given: 0

### Show Tags

14 Oct 2007, 00:00
bewakoof wrote:
Is the average(arithmetic mean) of 5 different positive integers atleast 30?

1. Each of the integers is a multiple of 10.

2. The sum of 5 integers is 160.

My question is, is 0 multiple of 10?

D,

Sum >=150 ?

1) Min possible sum: 10+20+30+40+50=150 or more SUFF
2) 160 is more than 150. SUFF.

D.

Kudos [?]: 79 [0], given: 0

Manager
Status: Got Bling! Joined Phd Finance at IIML
Joined: 03 Jul 2013
Posts: 95

Kudos [?]: 21 [0], given: 39

Location: India
Concentration: Finance, Economics
Schools: iim-bangalore - Class of 1994
GMAT 1: 750 Q59 V43
GPA: 3.12
WE: Research (Investment Banking)
Re: Is the average(arithmetic mean) of 5 different positive [#permalink]

### Show Tags

08 Jul 2013, 10:26
This answer should be a B anyone get this OA yet?

and bewa.. yes it is an integer and multiplied by tself it is the multiple of any integer incl 10 bu tthen the sum is already given, which boundary are you trying to fathom?

Kudos [?]: 21 [0], given: 39

Math Expert
Joined: 02 Sep 2009
Posts: 42544

Kudos [?]: 135267 [0], given: 12679

Re: Is the average(arithmetic mean) of 5 different positive [#permalink]

### Show Tags

08 Jul 2013, 10:43
docdrizzeally wrote:
This answer should be a B anyone get this OA yet?

and bewa.. yes it is an integer and multiplied by tself it is the multiple of any integer incl 10 bu tthen the sum is already given, which boundary are you trying to fathom?

Is the average (arithmetic mean) of 5 different positive integers at least 30?

It's almost always better to express the average in terms of the sum. The question basically asks whether the sum of 5 different positive integers is at least 5*30=150.

(1) Each of the integers is a multiple of 10 --> the least values of these 5 different positive integers are: 10, 20, 30, 40, and 50 --> the sum = 150. Sufficient.

(2) The sum of the 5 integers is 160. Directly answers the question. Sufficient.

OPEN DISCUSSION OF THIS QUESTION IS HERE: is-the-average-arithmetic-mean-of-5-different-positive-132144.html

In case of any questions please post in that thread. This topic is locked.
_________________

Kudos [?]: 135267 [0], given: 12679

Re: Is the average(arithmetic mean) of 5 different positive   [#permalink] 08 Jul 2013, 10:43
Display posts from previous: Sort by