GRE Prep 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.
Sep 28Live Online Class with Top GRE Expert Mike Butville
08:00 PM EDT
-10:00 PM EDT
Top scores are possible when you enroll in a powerful GRE course, taught live online + 6 months access to TTP GRE OnDemand video courses included! Class starts Mon/Wed Sept. 28, 2026 - Dec. 9, 2026, 8:00pm-10:00pm EST
Which of the following has/have exactly 4 positive integer
[#permalink]
13 Oct 2017, 02:06
13 Oct 2017, 02:06
1
Expert Reply
2
Bookmarks
00:00
Question Stats:
66% (00:47) correct
33% (00:43) wrong based on 121 sessions
Hide Show timer Statistics
Which of the following has/have exactly 4 positive integer factors?
Indicate \(all\) possible numbers.
❑ 4
❑ 6
❑ 8
❑ 12
❑ 14
Re: Which of the following has/have exactly 4 positive integer
[#permalink]
13 Oct 2017, 07:38
13 Oct 2017, 07:38
1
Carcass wrote:
Which of the following has/have exactly 4 positive integer factors?
Indicate \(all\) possible numbers.
❑ 4
❑ 6
❑ 8
❑ 12
❑ 14
Show: :: OA
B,C,E
Now
\(4 =2^2\)
Therefore no. of factors = 3 (since no of factors of \(n^m\) = m+1)
\(6 = 2^1 * 3^1\)
Therefore no. of factors = 4 (since no of factors of \(n^m\) and \(x^y\)= (m+1) * (y+1))
\(8 = 2^3\)
Therefore no. of factors = 4
\(12 = 2^2 * 3^1\)
Therefore no. of factors = 6
\(14 = 2^1 * 7^1\)
Therefore no. of factors = 4
Ans - B,C,E
Re: Which of the following has/have exactly 4 positive integer
[#permalink]
08 Sep 2019, 12:47
08 Sep 2019, 12:47
I think the question needs to specify "distinct" factors. Otherwise, it can be confusing.
