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# If a + b + c + d is a positive number, a minimum of x of the numbers

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Math Expert
Joined: 02 Sep 2009
Posts: 50044
If a + b + c + d is a positive number, a minimum of x of the numbers  [#permalink]

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29 Oct 2017, 01:07
1
1
00:00

Difficulty:

25% (medium)

Question Stats:

67% (00:55) correct 33% (01:02) wrong based on 70 sessions

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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 is equal to

(A) 0
(B) 1
(C) 2
(D) 3
(E) 4

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Joined: 16 Oct 2017
Posts: 2
Re: If a + b + c + d is a positive number, a minimum of x of the numbers  [#permalink]

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30 Oct 2017, 22:16
Bunuel wrote:
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 is equal to

(A) 0
(B) 1
(C) 2
(D) 3
(E) 4

If (d) > absolute value of l(a+b+c)l where d is positive, then x=1.

Intern
Joined: 02 Sep 2015
Posts: 37
Location: India
Concentration: General Management, Entrepreneurship
Schools: Sauder 'Dec 18
GPA: 3.79
WE: General Management (Energy and Utilities)
Re: If a + b + c + d is a positive number, a minimum of x of the numbers  [#permalink]

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01 Nov 2017, 17:07
The question asks for the minimum positive number so that the sum can be positive.
Out of the given options, the minimum positive number is 1.
Manager
Joined: 07 Jun 2017
Posts: 174
Location: India
Concentration: Technology, General Management
GMAT 1: 660 Q46 V38
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Re: If a + b + c + d is a positive number, a minimum of x of the numbers  [#permalink]

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01 Nov 2017, 22:33
take example that one number is 100 and other three number is -1 so minimum number should be 1
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Re: If a + b + c + d is a positive number, a minimum of x of the numbers &nbs [#permalink] 01 Nov 2017, 22:33
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