It is currently 19 Oct 2017, 08:22

# STARTING SOON:

Live Chat with Cornell Adcoms in Main Chat Room  |  R1 Interview Invites: MIT Sloan Chat  |  UCLA Anderson Chat  |  Duke Fuqua Chat (EA Decisions)

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If t denotes the thousandths digit in the decimal

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

### Hide Tags

Manager
Joined: 26 Jun 2007
Posts: 104

Kudos [?]: 83 [2], given: 0

If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

17 Jan 2008, 07:27
2
This post received
KUDOS
2
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

87% (00:39) correct 13% (00:54) wrong based on 233 sessions

### HideShow timer Statistics

d = 0.43t7

If t denotes the thousandths digit in the decimal representation of d above, what digit is t?

(1) If d were rounded to the nearest hundredth, the result would be 0.44
(2) If d were rounded to the nearest thousandth, the result would be 0.436
[Reveal] Spoiler: OA

Kudos [?]: 83 [2], given: 0

Director
Joined: 12 Jul 2007
Posts: 857

Kudos [?]: 330 [1], given: 0

Re: DS, digits rounding [#permalink]

### Show Tags

17 Jan 2008, 07:32
1
This post received
KUDOS
1. tells us that t = 5,6,7,8 or 9 INSUFFICIENT
2. tells us that t = 5 SUFFICIENT

Answer B

Kudos [?]: 330 [1], given: 0

Intern
Joined: 17 Jun 2012
Posts: 8

Kudos [?]: [0], given: 0

Re: d = 0.43t7 If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

13 Jul 2012, 17:46
Just a query- is 5 rounded up or down? Or is it left as it is?

Posted from my mobile device

Kudos [?]: [0], given: 0

Math Expert
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128864 [0], given: 12183

Re: d = 0.43t7 If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

13 Jul 2012, 18:11
amit82 wrote:
Just a query- is 5 rounded up or down? Or is it left as it is?

Posted from my mobile device

If the first dropped digit is 5 (or greater), ROUND UP the last digit that you keep.

Rounding is simplifying a number to a certain place value. To round the decimal drop the extra decimal places, and if the first dropped digit is 5 or greater, ROUND UP the last digit that you keep. If the first dropped digit is 4 or smaller, ROUND DOWN (keep the same) the last digit that you keep.

Example:
5.3485 rounded to the nearest tenth = 5.3, since the dropped 4 is less than 5.
5.3485 rounded to the nearest hundredth = 5.35, since the dropped 8 is greater than 5.
5.3485 rounded to the nearest thousandth = 5.349, since the dropped 5 is equal to 5.

For more check Number Theory chapter of Math Book: http://gmatclub.com/forum/math-number-theory-88376.html

d = 0.43t7

If t denotes the thousandths digit in the decimal representation of d above, what digit is t?

(1) If d were rounded to the nearest hundredth, the result would be 0.44. Just says that $$t\geq{5}$$. Not sufficient.
(2) If d were rounded to the nearest thousandth, the result would be 0.436. Since 7 is more than 5, then $$t$$ was rounded up to become 6, hence $$t=5$$. Sufficient.

Answer: B.

Hope it's clear.
_________________

Kudos [?]: 128864 [0], given: 12183

Intern
Joined: 17 Jun 2012
Posts: 8

Kudos [?]: [0], given: 0

Re: If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

14 Jul 2012, 06:39
yessss....it's absolutely clear... Thanks a lot...

Posted from my mobile device

Kudos [?]: [0], given: 0

Manager
Joined: 05 Nov 2012
Posts: 163

Kudos [?]: 40 [0], given: 57

Re: d = 0.43t7 If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

28 Nov 2012, 11:37
Bunuel wrote:
amit82 wrote:
Just a query- is 5 rounded up or down? Or is it left as it is?

Posted from my mobile device

If the first dropped digit is 5 (or greater), ROUND UP the last digit that you keep.

Rounding is simplifying a number to a certain place value. To round the decimal drop the extra decimal places, and if the first dropped digit is 5 or greater, ROUND UP the last digit that you keep. If the first dropped digit is 4 or smaller, ROUND DOWN (keep the same) the last digit that you keep.

Example:
5.3485 rounded to the nearest tenth = 5.3, since the dropped 4 is less than 5.
5.3485 rounded to the nearest hundredth = 5.35, since the dropped 8 is greater than 5.
5.3485 rounded to the nearest thousandth = 5.349, since the dropped 5 is equal to 5.

For more check Number Theory chapter of Math Book: http://gmatclub.com/forum/math-number-theory-88376.html

d = 0.43t7

If t denotes the thousandths digit in the decimal representation of d above, what digit is t?

(1) If d were rounded to the nearest hundredth, the result would be 0.44. Just says that $$t\geq{5}$$. Not sufficient.
(2) If d were rounded to the nearest thousandth, the result would be 0.436. Since 7 is more than 5, then $$t$$ was rounded up to become 6, hence $$t=5$$. Sufficient.

Answer: B.

Hope it's clear.

I agree with your answer but... for bold above... t can also take a value of 4 right? because we got a 7....

Kudos [?]: 40 [0], given: 57

Math Expert
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128864 [0], given: 12183

Re: d = 0.43t7 If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

29 Nov 2012, 04:26
Amateur wrote:
Bunuel wrote:
amit82 wrote:
Just a query- is 5 rounded up or down? Or is it left as it is?

Posted from my mobile device

If the first dropped digit is 5 (or greater), ROUND UP the last digit that you keep.

Rounding is simplifying a number to a certain place value. To round the decimal drop the extra decimal places, and if the first dropped digit is 5 or greater, ROUND UP the last digit that you keep. If the first dropped digit is 4 or smaller, ROUND DOWN (keep the same) the last digit that you keep.

Example:
5.3485 rounded to the nearest tenth = 5.3, since the dropped 4 is less than 5.
5.3485 rounded to the nearest hundredth = 5.35, since the dropped 8 is greater than 5.
5.3485 rounded to the nearest thousandth = 5.349, since the dropped 5 is equal to 5.

For more check Number Theory chapter of Math Book: http://gmatclub.com/forum/math-number-theory-88376.html

d = 0.43t7

If t denotes the thousandths digit in the decimal representation of d above, what digit is t?

(1) If d were rounded to the nearest hundredth, the result would be 0.44. Just says that $$t\geq{5}$$. Not sufficient.
(2) If d were rounded to the nearest thousandth, the result would be 0.436. Since 7 is more than 5, then $$t$$ was rounded up to become 6, hence $$t=5$$. Sufficient.

Answer: B.

Hope it's clear.

I agree with your answer but... for bold above... t can also take a value of 4 right? because we got a 7....

No, that's not correct. When we are rounding to the nearest hundredth, only thousandth digit matters since it's the first dropped digit (check example in my previous post).

Thus, 0.43t7 rounded to the nearest hundredth to be 0.44, t must be more than or equal to 5.

Hope it's clear.
_________________

Kudos [?]: 128864 [0], given: 12183

Manager
Joined: 05 Nov 2012
Posts: 163

Kudos [?]: 40 [0], given: 57

Re: If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

29 Nov 2012, 12:34
yup, I thought we need to round off 7 first and then the thousandth digit to round hundredth.... the process which you said, is it just employed in GMAT or in general too? thanks for clarifying....

Kudos [?]: 40 [0], given: 57

Math Expert
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128864 [0], given: 12183

Re: If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

30 Nov 2012, 04:03
Amateur wrote:
yup, I thought we need to round off 7 first and then the thousandth digit to round hundredth.... the process which you said, is it just employed in GMAT or in general too? thanks for clarifying....

This is a general rule, not only for the GMAT.
_________________

Kudos [?]: 128864 [0], given: 12183

Director
Joined: 02 Sep 2016
Posts: 776

Kudos [?]: 41 [0], given: 267

Re: If t denotes the thousandths digit in the decimal [#permalink]

### Show Tags

01 Apr 2017, 10:35
GGUY wrote:
d = 0.43t7

If t denotes the thousandths digit in the decimal representation of d above, what digit is t?

(1) If d were rounded to the nearest hundredth, the result would be 0.44
(2) If d were rounded to the nearest thousandth, the result would be 0.436

d=0.43t7

(1) Nearest hundredth (3)
We know that 1 got added to 3. Therefore t is greater than or equal to 5.
But no unique value for t.

Insufficient.

BCE

(2) Nearest thousandth (t)

The digit to the right of t is greater than 5, thus when we round the value to the thousandth place we add 1 to t. Therefore t is 5.
Sufficient.
B

Kudos [?]: 41 [0], given: 267

Re: If t denotes the thousandths digit in the decimal   [#permalink] 01 Apr 2017, 10:35
Display posts from previous: Sort by

# If t denotes the thousandths digit in the decimal

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

 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®.