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decimals

by Gurpinder » Fri Aug 20, 2010 12:41 pm
If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
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by beatthegmatinsept » Fri Aug 20, 2010 12:43 pm
Gurpinder wrote:If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
We need to answer if d is greater than or equal to 0.5.

(2) says when d is rounted to the rearest integer, the result if 1.0. This means d has to be greater than 0.5 AND has to be smaller than 1.5 (only then it can be rounded to 1.0).

Does that make sense?
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by Makushr1 » Fri Aug 20, 2010 3:09 pm
beatthegmatinsept wrote:
Gurpinder wrote:If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
We need to answer if d is greater than or equal to 0.5.

(2) says when d is rounted to the rearest integer, the result if 1.0. This means d has to be greater than 0.5 AND has to be smaller than 1.5 (only then it can be rounded to 1.0).

Does that make sense?
Nope :-)

How does 2 not show that it's greater than or equal to .5? By 2, it's saying that .5<or= d<or=1.49999999

So, that answers the question, doesn't it?
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by Stuart@KaplanGMAT » Fri Aug 20, 2010 6:27 pm
Gurpinder wrote:If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
(2) should be sufficient - what's the source of the question?

(You should always post the source, especially for suspect questions.)
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by Gurpinder » Fri Aug 20, 2010 6:35 pm
Stuart Kovinsky wrote:
Gurpinder wrote:If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
(2) should be sufficient - what's the source of the question?

(You should always post the source, especially for suspect questions.)

Source is OG.

2 is sufficient.
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by Gurpinder » Fri Aug 20, 2010 7:08 pm
beatthegmatinsept wrote:
Gurpinder wrote:If d denotes a decimal, is d ≥ 0.5 ?
(1) When d is rounded to the nearest tenth, the
result is 0.5.
(2) When d is rounded to the nearest integer,
the result is 1.

Can you explain how statement 2 is insuff?

Thanks guys!
We need to answer if d is greater than or equal to 0.5.

(2) says when d is rounted to the rearest integer, the result if 1.0. This means d has to be greater than 0.5 AND has to be smaller than 1.5 (only then it can be rounded to 1.0).

Does that make sense?
that makes sense

so 2 would be sufficient because d could be from 1.0 - 1.4 or .5 - .9 - in either case its greater than or equal to .5

thx
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