niks18 wrote:

Bunuel wrote:

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

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 \(n=4\).

SufficientStatement 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.

InsufficientOption

ADear 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

_________________

- Stne