GRE Prep 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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
On a scale that measures the intensity of a certain phenomenon, a read
[#permalink]
28 Mar 2022, 07:59
28 Mar 2022, 07:59
Expert Reply
00:00
Question Stats:
100% (02:06) correct
0% (00:00) wrong based on 2 sessions
Hide Show timer Statistics
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) 10^5
(D) 5^10
(E) 8^10 - 3^10
(A) 5
(B) 50
(C) 10^5
(D) 5^10
(E) 8^10 - 3^10
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: On a scale that measures the intensity of a certain phenomenon, a read
[#permalink]
28 Mar 2022, 09:00
28 Mar 2022, 09:00
1
Carcass wrote:
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) 10^5
(D) 5^10
(E) 8^10 - 3^10
(A) 5
(B) 50
(C) 10^5
(D) 5^10
(E) 8^10 - 3^10
STRATEGY: We could try to derive a formula that will help us calculate the intensity corresponding to a reading of 8.
However, it would be simple (and relatively fast) to use the "table method" to list each successive intensity reading.
This way, it will be easy to spot any mistakes we might make.
Let x the intensity corresponding to a reading of 3
So, our table, in the form reading | intensity, will look like this:
3 | x
4 | (x)(10)
5 | (x)(10)(10)
6 | (x)(10)(10)(10)
7 | (x)(10)(10)(10)(10)
8 | (x)(10)(10)(10)(10)(10)
The intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3?
Answer = (x)(10)(10)(10)(10)(10) / x
= (10)(10)(10)(10)(10)
= 10⁵
Answer: C
gmatclubot
Re: On a scale that measures the intensity of a certain phenomenon, a read [#permalink]
28 Mar 2022, 09:00
Moderators:
