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

 It is currently 12 Dec 2019, 01:38

### 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

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

# If x and y each represent a single digit, does the number 8.3xy round

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 59685
If x and y each represent a single digit, does the number 8.3xy round  [#permalink]

### Show Tags

24 Oct 2014, 08:30
1
1
00:00

Difficulty:

5% (low)

Question Stats:

83% (00:50) correct 17% (00:51) wrong based on 157 sessions

### HideShow timer Statistics

Tough and Tricky questions: Decimal.

If x and y each represent a single digit, does the number 8.3xy round to 8.3 when it is rounded to the nearest tenth?

(1) x = 5
(2) y = 9

_________________
Intern
Joined: 10 Jul 2014
Posts: 40
Concentration: Technology, Strategy
Re: If x and y each represent a single digit, does the number 8.3xy round  [#permalink]

### Show Tags

27 Oct 2014, 14:33
1
1

If x and y each represent a single digit, does the number 8.3xy round to 8.3 when it is rounded to the nearest tenth?

Question is asking if 8.3xy = 8.3 when tenth place of decimal is rounded. Tenth's place is 3 and it should remain 3. Which means x should be 0,1,2,3 or 4. Anything 5 and above will make it 3.4.

1) x = 5.
The number will not be equal to 8.3 Sufficient.

2) y = 9.
This does not tell about x. Not Sufficient.
Intern
Joined: 09 Oct 2016
Posts: 32
Re: If x and y each represent a single digit, does the number 8.3xy round  [#permalink]

### Show Tags

29 Aug 2017, 22:57
Bunuel wrote:

Tough and Tricky questions: Decimal.

If x and y each represent a single digit, does the number 8.3xy round to 8.3 when it is rounded to the nearest tenth?

(1) x = 5
(2) y = 9

I pick choice answer "C" for this question. I do not understand why Answer choice "A" is the correct one since 8.35 is half way between 8.30 and 8.40.
Math Expert
Joined: 02 Sep 2009
Posts: 59685
Re: If x and y each represent a single digit, does the number 8.3xy round  [#permalink]

### Show Tags

29 Aug 2017, 23:20
1
nawaf52 wrote:
Bunuel wrote:

Tough and Tricky questions: Decimal.

If x and y each represent a single digit, does the number 8.3xy round to 8.3 when it is rounded to the nearest tenth?

(1) x = 5
(2) y = 9

I pick choice answer "C" for this question. I do not understand why Answer choice "A" is the correct one since 8.35 is half way between 8.30 and 8.40.

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.

So, according to the above 8.35y rounded to the nearest tenth will be 8.4 irrespective of the value of y.

For mote on this check the following posts:
Math: Number Theory
Rounding Rules on the GMAT: Slip to the Side and Look for a Five!

For all other subject check the following posts:
ALL YOU NEED FOR QUANT ! ! !

Hope it helps.
_________________
Director
Joined: 27 May 2012
Posts: 947
Re: If x and y each represent a single digit, does the number 8.3xy round  [#permalink]

### Show Tags

21 Mar 2019, 06:23
Bunuel wrote:

Tough and Tricky questions: Decimal.

If x and y each represent a single digit, does the number 8.3xy round to 8.3 when it is rounded to the nearest tenth?

(1) x = 5
(2) y = 9

Since we are looking to round at the tenth place , knowing the value of X will be sufficient.
1)X=5 -> exactly what we are looking for , sufficient.
2)y=9 Not sufficient as we do not know the value of X

P.S. Please move question to DS from from PS forum.
_________________
- Stne
Re: If x and y each represent a single digit, does the number 8.3xy round   [#permalink] 21 Mar 2019, 06:23
Display posts from previous: Sort by