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Problem: If digit h is the hundrendths' digit in the decimal

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Intern
Joined: 20 Jan 2005
Posts: 37
Location: Bombay
Problem: If digit h is the hundrendths' digit in the decimal [#permalink]

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20 Feb 2005, 09:04
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Problem:

If digit h is the hundrendths' digit in the decimal d = 0.2h6, what is the value of d, rouded to the nearest tenth ?

(1) d <1/4

(2) h < 5
Intern
Joined: 19 Jul 2004
Posts: 43
Re: OG DS 58 ans discrepency [#permalink]

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20 Feb 2005, 09:10
singh wrote:
Problem:

If digit h is the hundrendths' digit in the decimal d = 0.2h6, what is the value of d, rouded to the nearest tenth ?

(1) d <1/4

(2) h < 5

Taking (1)... if d < 1/4, then h can take any of the values from 0 to 4.
hence value of "rounded" d can not be found. So no uniqe answer

Taking (2).. if h < 5, Again the value of "rounded" d can not be found.

Even taking (1) and (2) together, you get nothing...

So the answer can not be found.

Ketan
Intern
Joined: 20 Jan 2005
Posts: 37
Location: Bombay

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20 Feb 2005, 09:36
Sorry ketan this is not the right ans nor it is the right approach.

you missed that we need ans just to the tenth place.

But, my ans & explanation is different from ETS. I will write that later.
Intern
Joined: 20 Jan 2005
Posts: 37
Location: Bombay

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20 Feb 2005, 11:05
but by (2) h < 5 have 2 possibilities

h = 4
------
d = 0.246 = 0.25 = 0.3

But, if h = 0, 1, 2, 3
-----------------

d = 0.236 = 0.24(max) = 0.2

so I believe you cannot get ans with (2), any comments ??
Intern
Joined: 19 Jul 2004
Posts: 43

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20 Feb 2005, 11:29
singh wrote:
Sorry ketan this is not the right ans nor it is the right approach.

you missed that we need ans just to the tenth place.

But, my ans & explanation is different from ETS. I will write that later.

Oh...my fault....I agree...what is the correct answer?

Ketan
VP
Joined: 30 Sep 2004
Posts: 1480
Location: Germany

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20 Feb 2005, 15:35
singh wrote:
but by (2) h < 5 have 2 possibilities

h = 4
------
d = 0.246 = 0.25 = 0.3

But, if h = 0, 1, 2, 3
-----------------

d = 0.236 = 0.24(max) = 0.2

so I believe you cannot get ans with (2), any comments ??

you rounded it twice. 0,246 is nearer to 0,2 as it is to 0,3
Manager
Joined: 11 Jan 2005
Posts: 101

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20 Feb 2005, 17:48
I am getting D

i. sufficient as d<1/4 then d<0.25 then h<5, then d = 0.2
ii. sufficient as h<5 then d= 0.2
Manager
Joined: 01 Jan 2005
Posts: 166
Location: NJ

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20 Feb 2005, 19:32
D.

I) d<0.25 thus h<5 thus d=0.2
II) h<5 thus d=0.2

OA plz
Intern
Joined: 20 Jan 2005
Posts: 37
Location: Bombay

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21 Feb 2005, 21:43
OA is D.

But I am still not clear, is it WRONG to round of twice in the above case ..

means if I need to round of anything to 1 decimal place then I should only be looking in hundredth place and not thousadth ??? Please clarify.
21 Feb 2005, 21:43
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