Questions about the world of GMAT Math from other sources and general math related questions.
PH
 
 

Is Zero considered a multiple of anything?

by PH Sat Mar 01, 2008 6:34 pm

I was reviewing some problems that considered zero a multiple of say the number 5...meaning the multiples of 5 would start with zero, 5, 10, 15, etc...?

Is this the case...I never thought so....can anyone confirm this?...is this wrong?
blue_lotus
 
 

by blue_lotus Sun Mar 02, 2008 7:46 pm

Multiples whould actually mean product of number with natural number ( 1,2,3...)

Multiple of 5 would start with 5 not zero
StaceyKoprince
ManhattanGMAT Staff
 
Posts: 9360
Joined: Wed Oct 19, 2005 9:05 am
Location: Montreal
 

by StaceyKoprince Tue Mar 04, 2008 2:26 am

In math, multiples result from multiplying any integer (including zero or negatives) by the starting number. So, yes, 0 is a multiple of 5, as is -5. Technically, 0 is a multiple of any number.

This test doesn't typically test this concept though - you'll see that these types of problems tend to limit you to positive integers. This doesn't mean they will never test this, but I haven't seen a problem in the past 10 years that does test this... so I wouldn't worry about it too much!
Stacey Koprince
Instructor
Director, Content & Curriculum
ManhattanPrep