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If m is an integer, is m odd? 1. m/2 is not an even integer.

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If m is an integer, is m odd? 1. m/2 is not an even integer. [#permalink] New post 15 Aug 2005, 21:30
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If m is an integer, is m odd?

1. m/2 is not an even integer.
2. m-3 is an even integer.

For 1., does it mean that m/2 can be an odd integer or a fraction?

2. Another OG Q.

At the beginning of last month, a stationery store had in stock 250 writing pads, which had cost the store .75$ each. During the same month, the store made only 1 purchase of writing pads. What was the total amount spent by the store on writing pads it had in stock at the end of last month?

1. Last month, the store made only 1 purchase of 150 w.p. for .80$ each.
2. Last month the total revenue from he sale of w.p. was $180

Thanks
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Re: DS - 2Qs [#permalink] New post 15 Aug 2005, 22:38
Priti wrote:
Hi,

This is an OG Q.

If m is an integer, is m odd?

1. m/2 is not an even integer.
2. m-3 is an even integer.

For 1., does it mean that m/2 can be an odd integer or a fraction?

2. Another OG Q.

At the beginning of last month, a stationery store had in stock 250 writing pads, which had cost the store .75$ each. During the same month, the store made only 1 purchase of writing pads. What was the total amount spent by the store on writing pads it had in stock at the end of last month?

1. Last month, the store made only 1 purchase of 150 w.p. for .80$ each.
2. Last month the total revenue from he sale of w.p. was $180

Thanks



Q1

The first statement is sufficient because it do not give us any clue about m/2. It is said it is not even integer. We are not sure whether it is odd integer or fraction
Second statment is sufficient because m-3 is an even integer. This means m is odd. Because Odd-Odd=even

So the answer is B
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 [#permalink] New post 16 Aug 2005, 07:00
Second can't be A? You got to know if they have sold any from their stock right?
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 [#permalink] New post 16 Aug 2005, 07:30
HongHu wrote:
Second can't be A? You got to know if they have sold any from their stock right?


The questions says 'What was the total amount spent by the store on writing pads it had in stock at the end of last month? '

Stock item price is listed in the questions and additional WP purchased are in 1.

(250*0.75+150*80)

Am i missing something??
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 [#permalink] New post 16 Aug 2005, 07:39
Second one should be E.
Statement 1: Gives the total amount spent but does not give us any numbers regarding sales
Statement 2: Gives the total revenue but we do not know the cost price of these items.

Both statements put together - still we do not know the cost price of items sold.
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 [#permalink] New post 16 Aug 2005, 08:07
gotoknow3 wrote:
HongHu wrote:
Second can't be A? You got to know if they have sold any from their stock right?


The questions says 'What was the total amount spent by the store on writing pads it had in stock at the end of last month? '

Stock item price is listed in the questions and additional WP purchased are in 1.

(250*0.75+150*80)

Am i missing something??


Ok it is asking what the store spend on them. So I agree with you however much they earned from them doesn't really matter. :good

It tells us how important it is to carefully read and understand the question stem before go ahead and gives a solution. This is especially true for those of us who regard him/herself pretty good at this thing. :oops:
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 [#permalink] New post 16 Aug 2005, 08:11
The second cannot be A because the question is asking for the total amount spent by the store on writing pads it had in stock at the end of last month
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 [#permalink] New post 16 Aug 2005, 08:11
Yes. You are absolutely correct. Since you don't know how many pads they have sold, you don't know how many is in the stock. You can't simply deduce the revenue from the cost.

Ps I would admit that that first couple sentences of my last post make a good SC example. The reference of the two "them"s are obviously ambigous. :)
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 [#permalink] New post 16 Aug 2005, 09:23
i found my error; thanks honghu & rthothad
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 [#permalink] New post 16 Aug 2005, 11:43
The OA is E, thanks everyone.
  [#permalink] 16 Aug 2005, 11:43
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