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# On a scale that measures the intensity of a certain

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Manager
Joined: 03 Jul 2005
Posts: 194
Location: City
Followers: 1

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On a scale that measures the intensity of a certain [#permalink]  24 Sep 2006, 22:51
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 much times as great as the intensity corresponding to a reading of 3?

A) 5
B) 50
C) 10^5
D) 5^10
E) 8^10-3^10

Could not get to the answer, could you explain your workings, will post OA later.
Senior Manager
Joined: 14 Aug 2006
Posts: 365
Followers: 1

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

I get C

every reading it increases 10 fold.
Assuming :
1 -1
2 -10
3-100
4 - 10^3
5 - 10^4

8 - 10^ 7

Question asks how many times as great: 10^5
SVP
Joined: 05 Jul 2006
Posts: 1519
Followers: 5

Kudos [?]: 114 [0], given: 39

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 much times as great as the intensity corresponding to a reading of 3?

A) 5 B) 50 C) 10^5 D) 5^10 E) 8^10-3^10

LET THE INTENISTY OF (N+1) = 10X
// // // // // (N) = X

READING THREE INTENISTY IS = X
4 = 10X
5 = 10*10X

8 = 10^5X

THUS IT IS C IE 10^5 AS MUCH AS THE INTENISTY AT 3
Manager
Joined: 03 Jul 2005
Posts: 194
Location: City
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Kudos [?]: 5 [0], given: 0

thanks

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