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

It is currently 14 Dec 2019, 10:55

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

The product (8)(888...8), where the second factor has k digits, is an

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

Hide Tags

Find Similar Topics 
Senior Manager
Senior Manager
avatar
P
Status: Manager
Joined: 02 Nov 2018
Posts: 280
Location: Bangladesh
GMAT ToolKit User
The product (8)(888...8), where the second factor has k digits, is an  [#permalink]

Show Tags

New post 18 Mar 2019, 22:01
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

57% (03:15) correct 43% (01:45) wrong based on 14 sessions

HideShow timer Statistics

The product (8)(888...8), where the second factor has k digits, is an integer whose digits have a sum of 1000. What is k?

(A) 901
(B) 911
(C) 919
(D) 991
(E) 999
Manager
Manager
avatar
G
Joined: 31 Jul 2017
Posts: 87
Location: India
Schools: Anderson '21, LBS '21
GMAT ToolKit User Premium Member
Re: The product (8)(888...8), where the second factor has k digits, is an  [#permalink]

Show Tags

New post 18 Mar 2019, 23:03
1
Okay... So let's start with a simple multiplication

8*8=64----- sum of numbers = 10
8*88=704---- sum of numbers= 11
Seems like a pattern a is developing..To confirm let's do 2 more rounds..
8*888=7104----- sum =12
8*8888=71104--- sum =13

So k+9= sum of numbers
991+9 =1000

Posted from my mobile device
GMAT Club Bot
Re: The product (8)(888...8), where the second factor has k digits, is an   [#permalink] 18 Mar 2019, 23:03
Display posts from previous: Sort by

The product (8)(888...8), where the second factor has k digits, is an

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





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