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

It is currently 20 Jul 2018, 19:19

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 K is a positive integer, what is the units digit of K?

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

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47157
If K is a positive integer, what is the units digit of K?  [#permalink]

Show Tags

New post 21 Mar 2018, 05:25
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

74% (00:49) correct 26% (00:53) wrong based on 43 sessions

HideShow timer Statistics

BSchool Forum Moderator
User avatar
G
Joined: 07 Jan 2016
Posts: 727
Location: India
GMAT 1: 710 Q49 V36
Reviews Badge
If K is a positive integer, what is the units digit of K?  [#permalink]

Show Tags

New post 21 Mar 2018, 05:39
Bunuel wrote:
If K is a positive integer, what is the units digit of K?

(1) The units digit of 2K is 6.
(2) The hundreds digit of 100K is 8.


1) unit digit of 2k is 6

k can have a unit digit of 3 or 8

2)

hundreds digits of 100k is 8
k can be 8
if k is 28
100k = 2800 hundreds digit is 8



if k is a 3 digit number 108

100k=10800
if k is 1008
100800

k has to have unti digit 8
(B) imo
Manager
Manager
User avatar
G
Joined: 16 Sep 2016
Posts: 225
WE: Analyst (Health Care)
Premium Member CAT Tests
Re: If K is a positive integer, what is the units digit of K?  [#permalink]

Show Tags

New post 21 Mar 2018, 12:08
Hatakekakashi wrote:
Bunuel wrote:
If K is a positive integer, what is the units digit of K?

(1) The units digit of 2K is 6.
(2) The hundreds digit of 100K is 8.


1) unit digit of 2k is 6

k can have a unit digit of 3 or 8

2)

hundreds digits of 100k is 8
k can be 8
if k is 28
100k = 2800 hundreds digit is 0



if k is a 3 digit number 108

100k=10800

k has to be single digit 8
(B) imo


Hey Hatakekakashi, Option C you mean? :-)
BSchool Forum Moderator
User avatar
G
Joined: 07 Jan 2016
Posts: 727
Location: India
GMAT 1: 710 Q49 V36
Reviews Badge
If K is a positive integer, what is the units digit of K?  [#permalink]

Show Tags

New post 21 Mar 2018, 12:37
Gladiator59 wrote:

Hey Hatakekakashi, Option C you mean? :-)


why c?

edited my answer a bit
Manager
Manager
User avatar
G
Joined: 16 Sep 2016
Posts: 225
WE: Analyst (Health Care)
Premium Member CAT Tests
Re: If K is a positive integer, what is the units digit of K?  [#permalink]

Show Tags

New post 21 Mar 2018, 12:46
Hatakekakashi wrote:
Gladiator59 wrote:

Hey Hatakekakashi, Option C you mean? :-)


why c?


My Bad! B it is... I think I mixed up between units digit of k and 100k.

Best,
Gladi
Re: If K is a positive integer, what is the units digit of K? &nbs [#permalink] 21 Mar 2018, 12:46
Display posts from previous: Sort by

If K is a positive integer, what is the units digit of K?

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

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.