It is currently 14 Dec 2017, 07:25

Decision(s) Day!:

CHAT Rooms | Wharton R1 | Stanford R1 | Tuck R1 | Ross R1 | Haas R1

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The pattern of stones shown is contained completely around the circula

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 42605

Kudos [?]: 135629 [0], given: 12705

The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

29 Nov 2017, 21:55
00:00

Difficulty:

(N/A)

Question Stats:

86% (00:35) correct 14% (00:41) wrong based on 44 sessions

HideShow timer Statistics

The pattern of stones shown is contained completely around the circular bracelet so that the arc formed by joining the centers of any two adjacent stones is 45°. The number of stones on the bracelets is

(A) 5
(B) 6
(C) 8
(D) 10
(E) 12

[Reveal] Spoiler:
Attachment:

2017-11-30_0949_002.png [ 41.07 KiB | Viewed 509 times ]
[Reveal] Spoiler: OA

_________________

Kudos [?]: 135629 [0], given: 12705

Director
Joined: 25 Feb 2013
Posts: 619

Kudos [?]: 309 [0], given: 39

Location: India
GPA: 3.82
Re: The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

30 Nov 2017, 07:53
Bunuel wrote:

The pattern of stones shown is contained completely around the circular bracelet so that the arc formed by joining the centers of any two adjacent stones is 45°. The number of stones on the bracelets is

(A) 5
(B) 6
(C) 8
(D) 10
(E) 12

[Reveal] Spoiler:
Attachment:
2017-11-30_0949_002.png

Each arc equals $$45°$$

Number of stones = number of arcs

So number of arcs = $$\frac{360°}{45°}=8$$

Option C

Kudos [?]: 309 [0], given: 39

VP
Status: Learning
Joined: 20 Dec 2015
Posts: 1088

Kudos [?]: 89 [1], given: 571

Location: India
Concentration: Operations, Marketing
GMAT 1: 670 Q48 V36
GRE 1: 314 Q157 V157
GPA: 3.4
WE: Manufacturing and Production (Manufacturing)
The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

01 Dec 2017, 07:24
1
This post received
KUDOS
A very valuable point to note here is that when there are stones arranged in a straight line there would be n-1 segments .
But when they are connected in circle there would be as many segments as stones .
_________________

We are more often frightened than hurt; and we suffer more from imagination than from reality

Last edited by arvind910619 on 03 Dec 2017, 20:22, edited 1 time in total.

Kudos [?]: 89 [1], given: 571

Manager
Joined: 01 Feb 2017
Posts: 60

Kudos [?]: 19 [0], given: 20

Re: The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

02 Dec 2017, 14:10
In my opinion, it's best to imagine the entire ring and manually count the stones, just to avoid any calculation error.

There are 8 stones on the ring.

Ans C

Posted from my mobile device

Kudos [?]: 19 [0], given: 20

Director
Joined: 25 Feb 2013
Posts: 619

Kudos [?]: 309 [0], given: 39

Location: India
GPA: 3.82
Re: The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

02 Dec 2017, 18:21
Shobhit7 wrote:
In my opinion, it's best to imagine the entire ring and manually count the stones, just to avoid any calculation error.

There are 8 stones on the ring.

Ans C

Posted from my mobile device

Hi @Shobhit

Can you explain How one can imagine and manually calculate the number of stones without knowing the angle between them or without knowing that the stones are equally spaced?

If the angel between the stones would have been 10 then there would have been 36 stones are if the stones were not equally spaced then the number could have been different.

I think you need to know the number of sectors first and the may be visualise the ring with all sectors and stones on it

Sent from my iPhone using GMAT Club Forum mobile app

Kudos [?]: 309 [0], given: 39

Manager
Joined: 01 Feb 2017
Posts: 60

Kudos [?]: 19 [0], given: 20

Re: The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

03 Dec 2017, 00:40
niks18 wrote:
Shobhit7 wrote:
In my opinion, it's best to imagine the entire ring and manually count the stones, just to avoid any calculation error.

There are 8 stones on the ring.

Ans C

Posted from my mobile device

Hi @Shobhit

Can you explain How one can imagine and manually calculate the number of stones without knowing the angle between them or without knowing that the stones are equally spaced?

If the angel between the stones would have been 10 then there would have been 36 stones are if the stones were not equally spaced then the number could have been different.

I think you need to know the number of sectors first and the may be visualise the ring with all sectors and stones on it

Sent from my iPhone using GMAT Club Forum mobile app

Hi,

What I meant was, considering the data in the given figure, we know that there are 8 equally spaced sectors of 45 degrees each. Basis, we can imagine the ring and manually count the stones as well. This is just to avoid double counting any stone that's part of two adjacent sectors.

Posted from my mobile device

Kudos [?]: 19 [0], given: 20

Manager
Joined: 06 Jun 2013
Posts: 188

Kudos [?]: 18 [0], given: 314

Location: India
Concentration: Finance, Economics
Schools: Tuck
GMAT 1: 640 Q49 V30
GPA: 3.6
WE: Engineering (Computer Software)
Re: The pattern of stones shown is contained completely around the circula [#permalink]

Show Tags

06 Dec 2017, 18:25
C is the correct answer.

360/45 = 8

Kudos [?]: 18 [0], given: 314

Re: The pattern of stones shown is contained completely around the circula   [#permalink] 06 Dec 2017, 18:25
Display posts from previous: Sort by

The pattern of stones shown is contained completely around the circula

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.