GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Oct 2019, 23:12

Close

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

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 GMAT 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.

Close

Request Expert Reply

Confirm Cancel

If the product of 3 consecutive integers is 210, then the sum of the

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58398
If the product of 3 consecutive integers is 210, then the sum of the  [#permalink]

Show Tags

New post 28 Jan 2019, 04:48
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

89% (01:25) correct 11% (01:38) wrong based on 45 sessions

HideShow timer Statistics

VP
VP
User avatar
D
Joined: 31 Oct 2013
Posts: 1467
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
CAT Tests
If the product of 3 consecutive integers is 210, then the sum of the  [#permalink]

Show Tags

New post 28 Jan 2019, 05:03
Bunuel wrote:
If the product of 3 consecutive integers is 210, then the sum of the two smaller integers is ?

(A) 5
(B) 11
(C) 12
(D) 13
(E) 18



3 consecutive integers.

5 can be the sum of 2 consecutive integer. 3 + 2 = 5. So, 2*3*4 = 24. fail to meet the condition.

11 = 5 + 6 . could be.

12 can't sum of 2 consecutive integers.

13 = 6 + 7 . could be.

18 can't be the sum of 2 consecutive integers

if we consider 6 and 7 are the 2 smaller integers, 3rd will be 8 in this case. but 6*7*8 will not yield 210.

Thus , 3 consecutive integers will be 5*6*7 = 210.

B is the correct answer.
GMAT Club Legend
GMAT Club Legend
User avatar
D
Joined: 18 Aug 2017
Posts: 5027
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
Re: If the product of 3 consecutive integers is 210, then the sum of the  [#permalink]

Show Tags

New post 28 Jan 2019, 06:43
Bunuel wrote:
If the product of 3 consecutive integers is 210, then the sum of the two smaller integers is ?

(A) 5
(B) 11
(C) 12
(D) 13
(E) 18



210 = 5*6*7
5+6 = 11
IMO B
VP
VP
avatar
P
Joined: 07 Dec 2014
Posts: 1224
If the product of 3 consecutive integers is 210, then the sum of the  [#permalink]

Show Tags

New post 28 Jan 2019, 15:23
1
Bunuel wrote:
If the product of 3 consecutive integers is 210, then the sum of the two smaller integers is ?

(A) 5
(B) 11
(C) 12
(D) 13
(E) 18


210=(x-1)(x)(x+1)→
x^3-210=x
next perfect cube>210 is 6^3=216
216-210=6=x
x-1=5
5+6=11
B
Target Test Prep Representative
User avatar
D
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 8125
Location: United States (CA)
Re: If the product of 3 consecutive integers is 210, then the sum of the  [#permalink]

Show Tags

New post 30 Jan 2019, 19:08
Bunuel wrote:
If the product of 3 consecutive integers is 210, then the sum of the two smaller integers is ?

(A) 5
(B) 11
(C) 12
(D) 13
(E) 18



If the product of 3 consecutive integers is 210, then one of the integers is approximately the cube root of 210. Since ∛210 is approximately (but just less than) 6, we can guess that one of the consecutive integers is 6. Dividing 210 by 6, we obtain 35, which is 5 x 7, so we see that 210 = 5 x 6 x 7. The sum of the two smallest of these consecutive integers is 5 + 6 = 11. .

Answer: B
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

GMAT Club Bot
Re: If the product of 3 consecutive integers is 210, then the sum of the   [#permalink] 30 Jan 2019, 19:08
Display posts from previous: Sort by

If the product of 3 consecutive integers is 210, then the sum of the

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





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