Forum Home > GMAT > Quantitative > Problem Solving (PS)
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.
Dec 1310:00 AM EST
-12:00 PM EST
Have you ever wondered how to score a PERFECT 805 on the GMAT? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!
12 Feb 2016, 03:51
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
61% (01:53) correct
39%
(01:55)
wrong
based on 150
sessions
History
Date
Time
Result
Not Attempted Yet
If n is the product of three consecutive integers, and n is divisible by 7, which of the following is not necessarily a divisor of n ?
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
12 Feb 2016, 04:23
Kudos
Bookmarks
tjkim88
If n is the product of three consecutive integers, and n is divisible by 7, which of the following is not necessarily a divisor of n ?
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
The product of k consecutive integers is always divisible by k! (factorial of k).
So, according to the above, the product of 3 consecutive integers is divisible by 3! = 6. Since n is also divisible by 7, then it must be divisible by the LCM of 6 and 7, which is 42. Therefore n is divisible by 6, 14, 21 and 42. By POE the correct answer must be D.
Answer: D.
12 Feb 2016, 04:03
Kudos
Bookmarks
tjkim88
If n is the product of three consecutive integers, and n is divisible by 7, which of the following is not necessarily a divisor of n ?
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
(A) 6
(B) 14
(C) 21
(D) 28
(E) 42
can you explain why???
Hi,
first you have to see the minimum value and ways..
1) 5*6*7= 2*3*5*7
2) 6*7*8= 2^4*3*7
3) 7*8*9..=2^3*7*9..
what is the common in the three terms..
2*3*7..
lets find the choice which contains any term beyond these three..
(A) 6
2*3= so Always
(B) 14
2*7= again always
(C) 21
3*7= again always
(D) 28
2*2*7..
may be there, may not be there
CORRECT
(E) 42
2*3*7= again always
ans D
hope it helps
