GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 02 Jun 2020, 06:24

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 z < 1 what is the tenths digit of z?

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

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
P
Joined: 07 Apr 2018
Posts: 99
Reviews Badge
If z < 1 what is the tenths digit of z?  [#permalink]

Show Tags

New post 06 May 2018, 05:33
1
6
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

26% (01:19) correct 74% (01:41) wrong based on 66 sessions

HideShow timer Statistics

If z < 1 what is the tenths digit of z?

(1) The tens digit of 100z is 0

(2) z < 1/11
Retired Moderator
User avatar
V
Joined: 27 Oct 2017
Posts: 1808
WE: General Management (Education)
GMAT ToolKit User CAT Tests
Re: If z < 1 what is the tenths digit of z?  [#permalink]

Show Tags

New post 06 May 2018, 05:43
3
1
(1) The tens digit of 100z is 0
z = abc.def...
we have to find value of digit d
Now 100z = abcde.f...
if we observe carefully the tens digit of 100z is same as tenths digit of z.
So As tens digit of 100z is 0, this means d= 0. hence tenths digit of z is 0.
SUFFICIENT.

(2) z < 1/11
z<0.090909...
we tend to think than any smaller number has tenths digit = 0,
but DON'T forget to consider negative number also.
z can be 0.9 or -0.1, -2 etc.
hence the tenths digit cannot be found uniquely.
It is INSUFFICIENT.

Answer A
_________________
Retired Moderator
User avatar
V
Joined: 27 Oct 2017
Posts: 1808
WE: General Management (Education)
GMAT ToolKit User CAT Tests
Place value of digits in a number  [#permalink]

Show Tags

New post 06 May 2018, 07:15
1
Intern
Intern
avatar
B
Joined: 24 Feb 2019
Posts: 9
Location: India
Schools: ISB '21 (II)
GMAT 1: 680 Q47 V35
Re: If z < 1 what is the tenths digit of z?  [#permalink]

Show Tags

New post 08 Aug 2019, 09:32
gmatbusters wrote:
(1) The tens digit of 100z is 0
z = abc.def...
we have to find value of digit d
Now 100z = abcde.f...
if we observe carefully the tens digit of 100z is same as tenths digit of z.
So As tens digit of 100z is 0, this means d= 0. hence tenths digit of z is 0.
SUFFICIENT.

(2) z < 1/11
z<0.090909...
we tend to think than any smaller number has tenths digit = 0,
but DON'T forget to consider negative number also.
z can be 0.9 or -0.1, -2 etc.
hence the tenths digit cannot be found uniquely.
It is INSUFFICIENT.

Answer A

Nicely explained
GMAT Club Bot
Re: If z < 1 what is the tenths digit of z?   [#permalink] 08 Aug 2019, 09:32

If z < 1 what is the tenths digit of z?

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





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