On a certain scale of intensity, each increment of 10 in mag : GMAT Problem Solving (PS)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 16 Jan 2017, 05:52

### 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

# On a certain scale of intensity, each increment of 10 in mag

Author Message
TAGS:

### Hide Tags

Intern
Joined: 05 Oct 2009
Posts: 2
Followers: 0

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

On a certain scale of intensity, each increment of 10 in mag [#permalink]

### Show Tags

05 Oct 2009, 08:14
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

82% (01:00) correct 18% (00:20) wrong based on 6 sessions

### HideShow timer Statistics

1) On a certain scale of intensity, each increment of 10 in magnitude represents a tenfold increase in intensity. On this scale, an intensity corresponding to a magnitude of 165 is how many times an intensity corresponding to a magnitude of 125?
(A) 40
(B) 100
(C) 400
(D) 1,000
(E) 10,000

OPEN DISCUSSION OF THIS QUESTION IS HERE: on-a-certain-scale-of-intensity-each-increment-of-10-in-mag-84969.html

2) Harry started a 6-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 1 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mile during the first 5 miles of the hike?
(A) 4/5
(B) 5/6
(C) 1
(D) 6/5
(E) 5/4

OPEN DISCUSSION OF THIS QUESTION IS HERE: harry-started-a-6-mile-hike-with-a-full-10-cup-canteen-of-wa-17285.html

3) Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4 ,1/2 , and 5/8 , respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem ?
(A) 11/8
(B) 7/8
(C) 9/64
(D) 5/64
(E) 3/64

OPEN DISCUSSION OF THIS QUESTION IS HERE: xavier-yvonne-and-zelda-each-try-independently-to-solve-a-65822.html
Manager
Joined: 25 Aug 2009
Posts: 175
Location: Streamwood IL
Schools: Kellogg(Evening),Booth (Evening)
WE 1: 5 Years
Followers: 12

Kudos [?]: 176 [0], given: 3

Re: Good Word and prob qs [#permalink]

### Show Tags

05 Oct 2009, 08:35
1)
Mag Intensity
125 X
135 10X
145 100X
155 1,000X
165 10,000X

2) Total cups of water = 10
Less water remaining at the end = -1
Less water leaked in 2 hrs = -2
Less water consumed in last mile = -3
Water consumed during first 5 miles = 4
Water consumed per mile = 4/5.

3) probability that Xavier will solve the problem = 1/4
and Yvonne will solve the problem = 1/2*1/4
and Zeld won't solve the problem = 3/8*1/2*1/4 = 3/64

_________________

Rock On

Intern
Joined: 05 Oct 2009
Posts: 2
Followers: 0

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

Re: Good Word and prob qs [#permalink]

### Show Tags

05 Oct 2009, 09:48
Thanks Buddy I appreciate..
VP
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1353
Followers: 17

Kudos [?]: 240 [0], given: 10

Re: Good Word and prob qs [#permalink]

### Show Tags

03 May 2011, 07:43
10^4

10 - (1+2+3) = 4 cans consumed in 5 hrs
4/5

1/4 * 1/2 * 3/8
_________________

Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!

Director
Joined: 01 Feb 2011
Posts: 757
Followers: 14

Kudos [?]: 114 [0], given: 42

Re: Good Word and prob qs [#permalink]

### Show Tags

03 May 2011, 14:21
1.

lets say intensity on 125 reading is I

135 10I
145 100I
155 1000I
165 10000I

Director
Joined: 01 Feb 2011
Posts: 757
Followers: 14

Kudos [?]: 114 [0], given: 42

Re: Good Word and prob qs [#permalink]

### Show Tags

03 May 2011, 14:34
2.

total water available in the starting = 10 cups

left over in the end = 1 cup

=> water consumed during the trip = 9 cups

out of this water leaked @1 cup /hr = > 2 cups in 2 hours

=> actual amount of water consumed during the trip after excluding leakage = 7 cups

out of this , 3 cups were used during last mile

=> 4 cups of water were consumed during first 5 miles

=> in one mile , water consumed at the rate of 4/5 cups

Director
Joined: 01 Feb 2011
Posts: 757
Followers: 14

Kudos [?]: 114 [0], given: 42

Re: Good Word and prob qs [#permalink]

### Show Tags

03 May 2011, 14:36
3.

P(X).P(Y).P(not z) = $$(1/4)*(1/2)*(3/8)$$

= $$3/64$$

Current Student
Status: Everyone is a leader. Just stop listening to others.
Joined: 22 Mar 2013
Posts: 992
Location: India
GPA: 3.51
WE: Information Technology (Computer Software)
Followers: 163

Kudos [?]: 1456 [0], given: 227

Re: Good Word and prob qs [#permalink]

### Show Tags

23 May 2014, 08:48
1) On a certain scale of intensity, each increment of 10 in magnitude represents a tenfold increase in intensity. On this scale, an intensity corresponding to a magnitude of 165 is how many times an intensity corresponding to a magnitude of 125?
(A) 40
(B) 100
(C) 400
(D) 1,000
(E) 10,000
125 X
165 10000X
Ans E.

2) Harry started a 6-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 1 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mile during the first 5 miles of the hike?
(A) 4/5
(B) 5/6
(C) 1
(D) 6/5
(E) 5/4
10-1-2-3=4cups
4/5 per mile ans A.

3) Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4 ,1/2 , and 5/8 , respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem ?
(A) 11/8
(B) 7/8
(C) 9/64
(D) 5/64
(E) 3/64

1/4 * 1/2 * 3/8 = 3/64
E ans.
_________________

Piyush K
-----------------------
Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison
Don't forget to press--> Kudos
My Articles: 1. WOULD: when to use? | 2. All GMATPrep RCs (New)
Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Math Expert
Joined: 02 Sep 2009
Posts: 36509
Followers: 7063

Kudos [?]: 92875 [0], given: 10528

Re: On a certain scale of intensity, each increment of 10 in mag [#permalink]

### Show Tags

23 May 2014, 09:27
1) On a certain scale of intensity, each increment of 10 in magnitude represents a tenfold increase in intensity. On this scale, an intensity corresponding to a magnitude of 165 is how many times an intensity corresponding to a magnitude of 125?
(A) 40
(B) 100
(C) 400
(D) 1,000
(E) 10,000

OPEN DISCUSSION OF THIS QUESTION IS HERE: on-a-certain-scale-of-intensity-each-increment-of-10-in-mag-84969.html

2) Harry started a 6-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 1 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mile during the first 5 miles of the hike?
(A) 4/5
(B) 5/6
(C) 1
(D) 6/5
(E) 5/4

OPEN DISCUSSION OF THIS QUESTION IS HERE: harry-started-a-6-mile-hike-with-a-full-10-cup-canteen-of-wa-17285.html

3) Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4 ,1/2 , and 5/8 , respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem ?
(A) 11/8
(B) 7/8
(C) 9/64
(D) 5/64
(E) 3/64

OPEN DISCUSSION OF THIS QUESTION IS HERE: xavier-yvonne-and-zelda-each-try-independently-to-solve-a-65822.html
_________________
Re: On a certain scale of intensity, each increment of 10 in mag   [#permalink] 23 May 2014, 09:27
Similar topics Replies Last post
Similar
Topics:
In a certain diving competition, 5 judges score each dive on a scale 1 16 Nov 2015, 22:28
96 On a scale that measures the intensity of a certain phenomen 13 14 Jan 2012, 02:06
56 Each of the 30 boxes in a certain shipment weighs either 10 17 09 Oct 2009, 22:25
17 On a certain scale of intensity, each increment of 10 in mag 12 07 Oct 2009, 19:46
1 On a scale that measures the intensity of a certain 10 03 Jul 2008, 10:13
Display posts from previous: Sort by