It is currently 21 Sep 2017, 09:11

# Happening Now:

Live Chat with Amy Mitson, Sr. Associate Director of Admissions at Tuck Dartmouth

### 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

# ps - from OG11 #99

Author Message
Senior Manager
Joined: 30 Oct 2004
Posts: 284

Kudos [?]: 67 [0], given: 0

ps - from OG11 #99 [#permalink]

### Show Tags

13 Sep 2005, 17:00
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale, the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading at 3?
A) 5
B) 50
C) 10^5
D) 5^10
E) 8^10-3^10

Looking for a good explanation for this one.
Besides I think the OG is wrong in stating that 10^8 - 10^3 = 10^5.
_________________

-Vikram

Kudos [?]: 67 [0], given: 0

VP
Joined: 22 Aug 2005
Posts: 1112

Kudos [?]: 120 [0], given: 0

Location: CA

### Show Tags

13 Sep 2005, 17:08
ans shud be C. 10 ^ 5.

this is geometric progression.
if a is first term and r is ratio, nth term is ar ^ (n - 1)

here r = 10

3rd term: a*10^2
8th term: a * 10^7

dividing, ratio is:
10 ^ 5

Kudos [?]: 120 [0], given: 0

Senior Manager
Joined: 30 Oct 2004
Posts: 284

Kudos [?]: 67 [0], given: 0

### Show Tags

13 Sep 2005, 17:18
Thanks. That makes much more sense on how it is derived. What threw me off was the OG's explanation.
_________________

-Vikram

Kudos [?]: 67 [0], given: 0

13 Sep 2005, 17:18
Display posts from previous: Sort by

# ps - from OG11 #99

 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®.