Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1308:30 AM PDT
-09:30 AM PDT
In Episode 4 of our GMAT Ninja CR series, we tackle the most intimidating CR question type: Boldface & "Legalese" questions. If you've ever stared at an answer choice that reads, "The first is a consideration introduced to counter a position that...
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products.- May 14
08:30 AM PDT
-09:30 AM PDT
Most GMAT test-takers are intimidated by the hardest GMAT Verbal questions. In this session, Target Test Prep GMAT instructor Erika Tyler-John, a 100th percentile GMAT scorer, will show you how top scorers break down challenging Verbal questions.. - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
26 Oct 2015, 18:53
Kudos
Bookmarks
Hi I am confused on this and need detailed help with steps on how a particular step in this explanation is derived :
Question : Find the number of all the factors of 450
Answer was shown as 450 = \(\)2^1 x 3^2 x 5^2 and then this was further broken down to (1+1) x (2 + 1) x (2 + 1) = 18 factors
My confusion : where does the (1x1) x (2+1) x (2+1) come from?
I know the first part is the prime factorization right?
Question : Find the number of all the factors of 450
Answer was shown as 450 = \(\)2^1 x 3^2 x 5^2 and then this was further broken down to (1+1) x (2 + 1) x (2 + 1) = 18 factors
My confusion : where does the (1x1) x (2+1) x (2+1) come from?
I know the first part is the prime factorization right?
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
27 Oct 2015, 12:21
Kudos
Bookmarks
sagnik242
sagnik242 -
Yes, the first part is the prime factorization. The second part is a trick you can use to determine the number of unique factors. Following is a description:
Unique Factors Trick
There exists a “trick” for this type of problem that is worth knowing, but is not an essential priority to memorize. If such a question does come up, however, this rule will make solving it quite efficient. To find the number of unique factors of an integer:
1. Express the integer as a product of its prime factors, with each prime raised to its proper exponent. (In your example, it would be 2^1 x 3^2 x 5^2)
2. Strip the exponents off of the bases and “discard” the bases. In the example, you would now have 1, 2, and 2.
3. Add one to each exponent. In the example, now you would have 2, 3 and 3
4. Multiply those numbers, and that is the number of unique factors: 2 x 3 x 3 =18.
Hope this helps.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
