I'm developing new questions for a GMAT course and wanted some thoughts on this one:
How many positive divisors of 21,000 have exactly two prime factors, for example 100?
divisors of 21,000
This topic has expert replies
- kevincanspain
- GMAT Instructor
- Posts: 613
- Joined: Thu Mar 22, 2007 6:17 am
- Location: madrid
- Thanked: 171 times
- Followed by:64 members
- GMAT Score:790
Last edited by kevincanspain on Mon Sep 18, 2017 7:02 am, edited 1 time in total.
Kevin Armstrong
GMAT Instructor
Gmatclasses
Madrid
GMAT Instructor
Gmatclasses
Madrid
GMAT/MBA Expert
- Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770
It's a great idea for a question.kevincanspain wrote:I'm developing new questions for a GMAT course and wanted some thoughts on this one:
How many positive divisors of 21,000 have exactly two prime factors?
You might add some wording to specify whether a number like 36 satisfies the condition of having exactly two prime factors.