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In the addition problem above, each of the symbol represents

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In the addition problem above, each of the symbol represents [#permalink]

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New post 31 Jul 2011, 04:08
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+△
————————


In the addition problem above, each of the symbol represents a positive digit. If □ < △, what is the value of △?

(1) ★=4
(2) □=1


why □ can't be zero??
[Reveal] Spoiler: OA

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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 31 Jul 2011, 06:33
tracyyahoo wrote:
why □ can't be zero??


Zero is neither positive nor negative.

Stmt1: ★=4 and □ < △ △?

+△
————————


△= 3 Sufficient.

Stmt2: □=1
△ can be anything. Insufficient.

OA A.
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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 31 Jul 2011, 06:56
agree with you jamifahad answer is A
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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 01 Aug 2011, 20:49
You got it. Thank you so much. I forgot zero is neither positive nor negative. Thank you so much for the explaination.


jamifahad wrote:
tracyyahoo wrote:
why □ can't be zero??


Zero is neither positive nor negative.

Stmt1: ★=4 and □ < △ △?

+△
————————


△= 3 Sufficient.

Stmt2: □=1
△ can be anything. Insufficient.

OA A.

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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 02 Aug 2011, 10:48
Yes, zero is not positive, nor negative. But don't forget that it's even.

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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 02 Aug 2011, 17:55
tracyyahoo wrote:
Zero is even? Why?

From GMAT Club Math book, Number properties chapter:
math-number-theory-88376.html

Even and Odd Numbers

An even number is an integer that is "evenly divisible" by 2, i.e., divisible by 2 without a remainder.
An even number is an integer of the form n=2k, where k is an integer.

An odd number is an integer that is not evenly divisible by 2.
An odd number is an integer of the form n=2k+1, where k is an integer.

Zero is an even number.

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Re: DS problem pls help me to explain the problem~ Thank u~(2) [#permalink]

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New post 03 Aug 2011, 08:18
in number line anything left to zero is negative and right to zero is +ve

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Re: DS problem pls help me to explain the problem~ Thank u~(2)   [#permalink] 03 Aug 2011, 08:18
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In the addition problem above, each of the symbol represents

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