NEW HERE? LEARN MORE
closeclose
Last visit was: 26 Apr 2024, 02:30 It is currently 26 Apr 2024, 02:30
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If j and k each represent positive single digits, and y = 2.j3k, what

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92929
Own Kudos [?]: 619098 [3]
Given Kudos: 81609
Send PM
CAT Tests Forum Quiz Mode
If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   24 Oct 2014, 08:32
3
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

83% (01:17) correct 17% (01:22) wrong based on 343 sessions
Hide Show timer Statistics

Tough and Tricky questions: Decimal.



If j and k each represent positive single digits, and y = 2.j3k, what is y rounded to the nearest tenth?

(1) j > k
(2) If y is rounded to the nearest hundredth, the result is 2.74.
ShowHide Answer
Official Answer
B
User avatar
pairakesh10
Intern
Intern
Joined: 10 Jul 2014
Posts: 37
Own Kudos [?]: 61 [0]
Given Kudos: 35
Concentration: Technology, Strategy
Send PM
GMAT ToolKit User
Re: If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   27 Oct 2014, 14:40
Answer is B

If j and k each represent positive single digits, and y = 2.j3k, what is y rounded to the nearest tenth?

We need to know the value of j (either before or after rounding of y).

(1) j > k
j can be any value. Not Sufficient.

(2) If y is rounded to the nearest hundredth, the result is 2.74.
Result is 2.74. Value of j before rounding was 6. Sufficient.
avatar
Jonas84
Manager
Manager
Joined: 23 Aug 2012
Posts: 67
Own Kudos [?]: 15 [2]
Given Kudos: 35
Concentration: Technology
Schools: INSEAD Jan '17 (WL)
GMAT 1: 710 Q47 V40
Send PM
Re: If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   03 Oct 2015, 04:00
2
Kudos
pairakesh10 wrote:
Answer is B

If j and k each represent positive single digits, and y = 2.j3k, what is y rounded to the nearest tenth?

We need to know the value of j (either before or after rounding of y).

(1) j > k
j can be any value. Not Sufficient.

(2) If y is rounded to the nearest hundredth, the result is 2.74.
Result is 2.74. Value of j before rounding was 6. Sufficient.



Hi Pairakesh10

The value of j before the rounding would still be 7 not 6. Statement two only tell us that k>5.
User avatar
L
GMATinsight
GMAT Club Legend
GMAT Club Legend
Joined: 08 Jul 2010
Status:GMAT/GRE Tutor l Admission Consultant l On-Demand Course creator
Posts: 5960
Own Kudos [?]: 13391 [2]
Given Kudos: 124
Location: India
GMAT: QUANT+DI EXPERT
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
WE:Education (Education)
Send PM
Reviews Badge
If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   03 Oct 2015, 04:40
2
Kudos
Expert Reply
Bunuel wrote:

Tough and Tricky questions: Decimal.



If j and k each represent positive single digits, and y = 2.j3k, what is y rounded to the nearest tenth?

(1) j > k
(2) If y is rounded to the nearest hundredth, the result is 2.74.


Rounding off a number to nearest tenth digits depends on the Hundredth Digit of number and Tenth digit of number so we need to know the value of j to answer the question

Statement 1: j>k
Case1: j = 3, k = 4 and Rounded Off number y = 2.3
Case2: j = 4, k = 5 and Rounded Off number y = 2.4
NOT SIFFICIENT

Statement 2: If y is rounded to the nearest hundredth, the result is 2.74
i.e y may be either 2.73k where k is greater than 4
or y may be 2.74k where k is Less than 5

But since j= 7 therefore y rounded to the nearest tenth will be 2.7, Hence,
SUFFICIENT

Answer: option B

Bunuel or Engr2012 : Please shift the question in DS forum
User avatar
D
stonecold
Alum
Joined: 12 Aug 2015
Posts: 2282
Own Kudos [?]: 3131 [0]
Given Kudos: 893
Schools: Boston U '20 (M)
GRE 1: Q169 V154
Send PM
GMAT ToolKit User
Re: If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   18 Nov 2016, 23:15
Great Question
Here, rounding y to nearest tenths will result in 2.J (as the next digit is 3)
Thus we need to get J. We don't to find K
Statement 1
J>k
Clearly since multiple values of j can be computed from this=> This statement is insufficient
Statement 2
From this statement we can conclude two things
1)J must be 7
2)k must be greater than 4

As we already know that we don't need k we just need J and we have got J as 7
Thus this statement is sufficient to say that Y rounded to nearest tenths would result in 2.7
hence this statement is sufficient

Hence B
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32678
Own Kudos [?]: 822 [0]
Given Kudos: 0
Send PM
Re: If j and k each represent positive single digits, and y = 2.j3k, what [#permalink] New post   01 Mar 2018, 14:13
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
gmatclubot
Re: If j and k each represent positive single digits, and y = 2.j3k, what [#permalink]
01 Mar 2018, 14:13
Moderator:
Bunuel
Math Expert
92929 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions