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Intern
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If p is an integer and m = -p + (-2)**p, is m**3 > 1? [#permalink]
 28 Nov 2005, 07:58
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Question 1
If p is an integer and m = -p + (-2)**p, is m**3 > 1?
(1) p is even
(2) p**3 <= -1
Question 2
In a certain city the ratio of the numbr of people
who purchase newspaper X to the numb of people
who purchases newspaper Y is 7:1. What percent of
the population purchases newspaper Y?
(1) 27% of population purchases neither newspaper X nor newspaper Y.
(2) 70% of the people wo purchase newspaper Y also purchase newspaper X.
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Manager
Joined: 12 Mar 2005
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Location: Milton Keynes UK
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Answer to question 2 is;
9.125 % of the population purchases newspaper Y
_________________
The ability to focus attention on important things is a defining characteristic of intelligence.
--by Robert J. Shiller
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Manager
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Ans. to Q 1
C
i) p is even
so p could be -2, 0, 2
Plugging values in the eqn:
p -2 , 0 , 2
m 2.25 , 1 , 2
Insufficient
ii) p**3 < -1 so p is negative
Plugging values in the eqn:
p -1 , -2 , -3
m 0.5 , 2.25 , 3.125
Insufficient
But i & ii together are sufficient
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SVP
Joined: 28 May 2005
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believe2 wrote: Ans. to Q 1
C
i) p is even
so p could be -2, 0, 2
Plugging values in the eqn:
p -2 , 0 , 2
m 2.25 , 1 , 2
Insufficient
ii) p**3 < -1 so p is negative
Plugging values in the eqn:
p -1 , -2 , -3
m 0.5 , 2.25 , 3.125
Insufficient
But i & ii together are sufficient
yup C is the anwer. very good question in deed.
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hey ya......
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Director
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Re: DS from Kaplan [#permalink]
28 Nov 2005, 13:58
gmatjay wrote:
Question 2
In a certain city the ratio of the numbr of people
who purchase newspaper X to the numb of people
who purchases newspaper Y is 7:1. What percent of
the population purchases newspaper Y?
(1) 27% of population purchases neither newspaper X nor newspaper Y.
(2) 70% of the people wo purchase newspaper Y also purchase newspaper X.
A
(1) 27% of population purchases neither newspaper X nor newspaper Y.
sufficient 73*1/8
2) not Sufficient
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Manager
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Good to see you get the same answer.
73*1/8 = 9.125%
_________________
The ability to focus attention on important things is a defining characteristic of intelligence.
--by Robert J. Shiller
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Manager
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Re: DS from Kaplan [#permalink]
28 Aug 2007, 10:10
cool_jonny009 wrote: gmatjay wrote:
Question 2
In a certain city the ratio of the numbr of people
who purchase newspaper X to the numb of people
who purchases newspaper Y is 7:1. What percent of
the population purchases newspaper Y?
(1) 27% of population purchases neither newspaper X nor newspaper Y.
(2) 70% of the people wo purchase newspaper Y also purchase newspaper X.
A (1) 27% of population purchases neither newspaper X nor newspaper Y. sufficient 73*1/8 2) not Sufficient could somebody check this please? my initial answer was also (A), but the kaplan solution says it is not sufficient since the ratio does not include the percentage of population reading BOTH newspapers... so their answer is (C).
does the "ratio rule" (i.e. 73*1/8) perhaps only work when there is no overlap of two things??
thanx!
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Senior Manager
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can someone provide with last answer to this question I mean value in percentages?
Thanx in advance
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