Math questions from any Manhattan Prep GMAT Computer Adaptive Test.
ts_krish
Course Students
 
Posts: 5
Joined: Tue Nov 07, 2006 9:50 am
 

Are factors ints by definition?

by ts_krish Sat Dec 04, 2010 4:03 pm

Hi,
I've a fundamental question. Which of the following definitions is correct?

1. A factor of a given integer is any number that divides the given integer evenly.

2. A factor of a given integer is another integer that divides the given integer evenly.

I've seen both the definitions on the web and not sure which one is correct, specifically as applied to questions on the GMAT.

This understanding seems critical in some of the DS questions on number properties, when you are given a statement such as

q is an integer with factors a and b.

If we want to infer whether a or b is an integer, we've to be clear on the definition of the term factor.

Could someone please clarify?
atul.prasad
Students
 
Posts: 34
Joined: Thu Sep 09, 2010 8:57 pm
 

Re: Are factors ints by definition?

by atul.prasad Sat Dec 04, 2010 4:50 pm

Hi,

Factors always refer to integers and the term is always used in context of integers.

Imagine, if they were real numbers, every number would be a factor of every other number :)
jnelson0612
ManhattanGMAT Staff
 
Posts: 2664
Joined: Fri Feb 05, 2010 10:57 am
 

Re: Are factors ints by definition?

by jnelson0612 Mon Dec 06, 2010 7:40 am

atul is correct (once again!). Factors are always integers.

Thank you,
Jamie Nelson
ManhattanGMAT Instructor