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12 Oct 2017, 04:09
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
51% (01:42) correct
49%
(01:33)
wrong
based on 107
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If n is a positive integer and p = 3.021*10^n, what is the value of n?
(1) 3,021 < p < 302,100
(2) 10^3 < p < 10^5
(1) 3,021 < p < 302,100
(2) 10^3 < p < 10^5
12 Oct 2017, 08:25
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Bunuel
Statement 1: \(3021<3.021*10^n<302100\). divide both sides of the inequality by \(3.021\) to get
\(10^3<10^n<10^5\) as \(n\) is an integer, only value in this range is \(n=4\). Sufficient
Statement 2: \(1000<p<100000\)
now if \(n=3\), then \(p = 3021\) and \(1000<3021<100000\)
but if \(n = 4\), then \(p=30210\) and \(1000<30210<100000\)
Hence there is no unique value. Insufficient
Option A
14 Jul 2018, 08:54
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niks18
Dear Moderator,
Kindly explain how OA is D? IMO it should be A
statement B :
\(10^3\)< P \(< 10^5\)
since 3021 and 30210 both are between \(10^3\) and \(10^5\) hence does not seem sufficient.
1,000 < 3,021 <30,210 <100,000 hence value of P can be 3021 or 30210
