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20 Jul 2016, 09:03
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Difficulty:
35%
(medium)
Question Stats:
48% (00:33) correct
52%
(00:58)
wrong
based on 29
sessions
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Not Attempted Yet
If A is the factor of B and B is the factor of A then which of the following must be true?
A) A=B
B) A=-B
C) A=1
D) A=B or A=-B
E) A=0 or B=0
A) A=B
B) A=-B
C) A=1
D) A=B or A=-B
E) A=0 or B=0
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20 Jul 2016, 10:40
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stonecold
Aside: This question is centered around the notion that the factors of an integer can be either positive of negative.
For example, the factors of 6 are: {1, 2, 3, 6, -1, -2, -3, and -6}
While this is true, the GMAT typically restricts the discussion of factors to positive factors only.
Note: I want to say "always" here. I've certainly never seen an official GMAT question that doesn't restrict the discussion to positive factors.
Cheers,
Brent
20 Jul 2016, 11:14
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stonecold
This is not a GMAT-like question. For the GMAT, you can consider a factor to be a positive divisor.
