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.
If n is a factor of 129. How many values of n are possible
[#permalink]
25 Aug 2018, 12:03
25 Aug 2018, 12:03
Expert Reply
00:00
Question Stats:
66% (01:13) correct
33% (00:34) wrong based on 12 sessions
Hide Show timer Statistics
If n is a factor of 129. How many distinct positive integer values of n are possible?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
Re: If n is a factor of 129. How many values of n are possible
[#permalink]
31 Aug 2018, 03:33
31 Aug 2018, 03:33
1
Answer has to 4 do not forget to include 1 and 129 with 43 and 3.
Re: If n is a factor of 129. How many values of n are possible
[#permalink]
31 Aug 2018, 05:49
31 Aug 2018, 05:49
this number is small so you can count but some are not easy to count. Systematic approach: this question is the same as asking how many distinct factors of 129. First do prime factorization: 129 = 3x43. 3 has power of 1, and 43 has power of 1 => # of distinct factors = (1+1)x(1+1)=4
