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test 39 #13

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by dunkin77 » Tue May 01, 2007 2:03 am
13. 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


Hi,
I thought the answer was simply C) but turned out to be E)...... Can anyone help pls?
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by Cybermusings » Tue May 01, 2007 8:49 am
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

10 increase in magnitute represents a tenfold increase in intensity
10 increase ---- Factor number by 10
20 increase ----- factor by 10 * Factor by 10
40 increase ----- factor by 10*factor by 10* factor by 10* factor by 10 = 10,000
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by Scott@TargetTestPrep » Mon May 20, 2019 6:12 pm
dunkin77 wrote:13. 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
Since 125 is 40 away from 165, the intensity of 165 is 10 x 10 x 10 x 10 = 10,000 times that of 125.

Answer: E

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by Brent@GMATPrepNow » Tue May 21, 2019 6:25 am
Here's a related question to practice with: https://www.beatthegmat.com/intensity-s ... 73997.html

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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