Last visit was: 16 Sep 2026, 03:48 It is currently 16 Sep 2026, 03:48
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GRE score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
PREVIOUS TOPIC
NEXT TOPIC

Least prime factor of (7! + 7)

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

avatar
Sonalika42
Manager
Manager
Joined: 12 Jan 2016
Posts: 142
Own Kudos [?]: 227 [7]
Given Kudos: 0
Send PM
Least prime factor of (7! + 7) [#permalink] New post   01 Sep 2016, 04:41
1
6
Bookmarks
00:00

Question Stats:

49% (01:32) correct 50% (01:12) wrong based on 75 sessions

Hide Show timer Statistics

Quantity A
Quantity B
Least prime factor of (7! + 7)
Greatest prime factor of 7!





A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
ShowHide Answer
Official Answer
C
avatar
Sonalika42
Manager
Manager
Joined: 12 Jan 2016
Posts: 142
Own Kudos [?]: 227 [0]
Given Kudos: 0
Send PM
Re: Least prime factor of (7! + 7) [#permalink] New post   01 Sep 2016, 04:44
Please provide your answer with explaination as i am confused.
avatar
phoenixio
Intern
Intern
Joined: 03 Jun 2016
Posts: 37
Own Kudos [?]: 157 [4]
Given Kudos: 0
Send PM
Re: Least prime factor of (7! + 7) [#permalink] New post   01 Sep 2016, 07:03
4
7!+7= 7(6!+1)= 7*721 => least prime factor is 7
7!= 7*6! => greatest prime factor is 7

Answer C
User avatar
P
GreenlightTestPrep
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12827 [0]
Given Kudos: 136
Send PM

Top Member of the Month
Re: Least prime factor of (7! + 7) [#permalink] New post   09 Jun 2017, 13:42
1
Sonalika42 wrote:
Quantity A
Quantity B
Least prime factor of (7! + 7)
Greatest prime factor of 7!





A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.


Quantity A: Least prime factor of (7! + 7)
7! + 7 = 7(6! + 1)
= 7(6 x 5 x 4 x 3 x 2 x 1 + 1)
= 7(720 + 1)
= (7)(721)
= (7)(7)(103)
Since 103 is prime, the least prime factor is 7


Quantity B: Greatest prime factor of 7!
7! = (7)(6)(5)(4)(3)(2)(1)
= (7)(2)(3)(5)(2)(2)(3)(2)(1)
The greatest prime factor is 7

So...
Quantity A: 7
Quantity B: 7

Answer:
Show: ::
C


Cheers,
Brent
User avatar
bumpbot
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 6089
Own Kudos [?]: 87 [0]
Given Kudos: 0
Send PM
Re: Least prime factor of (7! + 7) [#permalink] New post   08 Oct 2025, 21:53
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
gmatclubot
Re: Least prime factor of (7! + 7) [#permalink]
08 Oct 2025, 21:53
Moderators:
adewale223
GRE Instructor
166 posts
bronaugust
GRE Forum Moderator
37 posts
VibhuAnurag
GRE Instructor
275 posts
Nsp10
Moderator
45 posts
tyrant100
GRE Forum Moderator
144 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact | Advertise