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# PS minimum

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Director
Joined: 02 Mar 2006
Posts: 582
Location: France
Followers: 1

Kudos [?]: 35 [0], given: 0

PS minimum [#permalink]  11 Mar 2006, 14:22
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hi,

I don't really understand this pb:

If a+b+c+d is a positive number, a minimum of x of the numbers a,b,c, and d must be positive where x equal to
0
1
2
3
4
Manager
Joined: 20 Mar 2005
Posts: 201
Location: Colombia, South America
Followers: 1

Kudos [?]: 6 [0], given: 0

Re: PS minimum [#permalink]  11 Mar 2006, 15:23
karlfurt wrote:
Hi,

I don't really understand this pb:

If a+b+c+d is a positive number, a minimum of x of the numbers a,b,c, and d must be positive where x equal to
0
1
2
3
4

I would say 1

as we are adding, we can have 3 negative numbers but if the sum of those three is less than the amount of the only one that is positive, then the sum of a+b+c+d would be positive
Director
Joined: 02 Mar 2006
Posts: 582
Location: France
Followers: 1

Kudos [?]: 35 [0], given: 0

You're right!

I just understood.

I tought x = min(a,b,c,d)...
Senior Manager
Joined: 22 Nov 2005
Posts: 479
Followers: 1

Kudos [?]: 3 [0], given: 0

I also think it is 1. as explained above there could be 3 -ve and 1 +ve, Since 1 is the minimum value > 0. So answer is 1
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