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by camitava » Sat Sep 22, 2007 7:12 am
Pls answer the question -
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 of 3 ?
(A) 5 (B) 50 (C)
(D) (E)
Please tell me the approach also ...



OA is C
Correct me If I am wrong


Regards,

Amitava
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by kajcha » Sat Sep 22, 2007 5:23 pm
Options C, D and E are missing in your question.

However, this is how I solved it

suppose intensity of reading 3 = x

so, intensity of reading 4 = 10x

for 5 = 100x
for 6 = 1000x
for 7 = 10000x
for 8 = 100000x

intensity of reading 8 is 100000 times greater.
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by camitava » Sun Sep 23, 2007 11:17 pm
Thank u, Kajcha! Ohhh I dnt know how I missed to provide the three options - C,D and E. However, C - 10^5 D - 5^10 E - 8^10 - 3^10. Thanks once again, Kajcha.
Correct me If I am wrong


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Amitava
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