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a silly one- definition of a factor

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
Source: — Quantitative Reasoning |

by KapTeacherEli » Wed Aug 11, 2010 11:55 am
Hi talcito,

Although negative numbers are divisible by -1, -1 isn't a factor--the word 'factor', by definition, refers to positive numbers that divide evenly into other positive numbers.

Hope this helps!
Eli Meyer
Kaplan GMAT Teacher
Cambridge, MA
www.kaptest.com/gmat

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