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Is z+z<z? 1) -4z>4z 2) z^3<z^2

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Senior Manager
Joined: 22 Sep 2005
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Is z+z<z? 1) -4z>4z 2) z^3<z^2 [#permalink]

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18 Oct 2006, 13:26
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Is z+z<z?

1) -4z>4z
2) z^3<z^2

Kudos [?]: 241 [0], given: 1

SVP
Joined: 05 Jul 2006
Posts: 1750

Kudos [?]: 430 [0], given: 49

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18 Oct 2006, 13:45
Is z+z<z?

1) -4z>4z
2) z^3<z^2

IS Z>Z/2 NOT TRUE ONLY IF Z IS NEGATIVE

FROM ONE

-Z>Z THUS Z IS NEGATIVE ...SUFF

FROM TWO

Z IS NEGATIVE > OR <1 OR A POSITIVE FRACTION

i SAY A

Last edited by yezz on 18 Oct 2006, 14:45, edited 2 times in total.

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Senior Manager
Joined: 08 Jun 2006
Posts: 335

Kudos [?]: 62 [0], given: 0

Location: Washington DC

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18 Oct 2006, 14:25
I think it is A.

z + z < z is possible for all negative - integers and fractions

From 1) we get z is negative

From 2) Not suff

Kudos [?]: 62 [0], given: 0

Senior Manager
Joined: 11 May 2006
Posts: 258

Kudos [?]: 23 [0], given: 0

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18 Oct 2006, 14:41
netcaesar wrote:
Is z+z<z?

1) -4z>4z
2) z^3<z^2

A

question : is z < 0 ?

from 1) 0 > 8z or z < 0 hence sufficient

from 2) z could be either negative or positive ( 0 < z < 1)

Kudos [?]: 23 [0], given: 0

Director
Joined: 23 Jun 2005
Posts: 840

Kudos [?]: 86 [0], given: 1

GMAT 1: 740 Q48 V42

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18 Oct 2006, 19:03
netcaesar wrote:
Is z+z<z?

1) -4z>4z
2) z^3<z^2

A

2z<z only if z is -ve.

Statement 1: z is negative SUFF

Statement 2: 0<z<1, or z<0 INSUFF

Kudos [?]: 86 [0], given: 1

Senior Manager
Joined: 13 Sep 2006
Posts: 279

Kudos [?]: 22 [0], given: 0

Location: New York

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31 Oct 2006, 08:34
Late but A for me as well.

Statement 2 could be a fraction or a negative number.
_________________

"Never let the fear of striking out get in your wayâ€

Kudos [?]: 22 [0], given: 0

31 Oct 2006, 08:34
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Is z+z<z? 1) -4z>4z 2) z^3<z^2

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