It is currently 18 Dec 2017, 10:47

# Final Week of R1 Decisions:

CHAT Rooms | MIT Sloan | McCombs

### 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

# Events & Promotions

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

# If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10

Author Message
TAGS:

### Hide Tags

Manager
Status: 2 months to go
Joined: 11 Oct 2015
Posts: 135

Kudos [?]: 165 [0], given: 36

GMAT 1: 730 Q49 V40
GPA: 3.8
If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

18 Jul 2016, 01:13
1
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

78% (01:37) correct 22% (02:04) wrong based on 94 sessions

### HideShow timer Statistics

If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10n, then what is the value of T?

1) $$\sqrt{A*10^m}=23100$$

2) $$n-m=7$$

Like always: Kudos if you like.
[Reveal] Spoiler: OA

Kudos [?]: 165 [0], given: 36

Intern
Joined: 06 Aug 2015
Posts: 46

Kudos [?]: 19 [2], given: 63

Concentration: General Management, Entrepreneurship
GMAT Date: 10-30-2016
GPA: 3.34
WE: Programming (Consulting)
Re: If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

18 Jul 2016, 01:36
2
KUDOS
Option C)

If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10n, then what is the value of T?

From stat 1:
Values of A & m can be retrieved. But we dont know the value of n.
Hence not suff.

From stat 2:
We dont know the value of A.
Hence not suff.

1 + 2:
We have the value of A & n.
A = (2.31)^2, m = 8, n = 15.
T = (2.31) x 10^15.
Hence, Sufficient.

Kudos if you like the explanation.
Harry

Kudos [?]: 19 [2], given: 63

Intern
Joined: 15 Sep 2012
Posts: 2

Kudos [?]: 5 [0], given: 22

Location: India
GMAT 1: 610 Q43 V38
GPA: 2.88
WE: Operations (Energy and Utilities)
Re: If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

27 Dec 2016, 22:17
Option C)

If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10n, then what is the value of T?

From stat 1:
Values of A & m can be retrieved. But we dont know the value of n.
Hence not suff.

From stat 2:
We dont know the value of A.
Hence not suff.

1 + 2:
We have the value of A & n.
A = (2.31)^2, m = 8, n = 15.
T = (2.31) x 10^15.
Hence, Sufficient.

Kudos if you like the explanation.
Harry

I donot understand here how you got the value of A ? if you do explain little more then it helpful for me.

Kudos [?]: 5 [0], given: 22

Director
Affiliations: CrackVerbal
Joined: 03 Oct 2013
Posts: 515

Kudos [?]: 617 [1], given: 6

Location: India
GMAT 1: 780 Q51 V46
Re: If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

28 Dec 2016, 23:12
1
KUDOS
Top Contributor
1
This post was
BOOKMARKED
Hi Samprits,

When dealing with a DS question it is important that you use all pieces of information provided both in the question stem as well as the statement.

We know that 4 < A < 6 and n and m are integers. To find the value of T we need the value of A and the value of n since T = A * 10n.

Statement 1 : (A * 10^m)^0.5 = 23100

Squaring both sides we get (A * 10^m) = (23100)^2 ------> (A * 10^m) = (23100 * 23100) ------> A = (23100 * 23100)/10^m

Now since A needs to be between 4 and 6, we need A to be 2.31 * 2.31, since 2.31 * 2.31 is the only possible product which gives us a value of A between 4 and 6. So the value of m which gives us A as 2.31 * 2.31 is 8.

However statement 1 does not give us any information about n. Insufficient.

Statement 2 : n - m = 7

Here we can have multiple values for n and m and do not have any information about A. Insufficient.

Combining statements 1 and 2

We have A = 2.31 * 2.31, m = 8 and since n - m = 7, n has to be 15. Sufficient.

Hope this helps!

_________________

Join Free 4 part MBA Through GMAT Video Training Series here -
https://gmat.crackverbal.com/mba-through-gmat-video-2018

Enroll for our GMAT Trial Course here -
http://gmatonline.crackverbal.com/

Kudos [?]: 617 [1], given: 6

Intern
Joined: 08 Aug 2015
Posts: 46

Kudos [?]: 11 [0], given: 41

Location: India
Concentration: Strategy, Marketing
GMAT 1: 680 Q49 V34
GPA: 3
WE: Marketing (Internet and New Media)
Re: If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

28 Dec 2016, 23:51
I have a question about the the information presented in the question. In particular this, " 4 < A < 6 "

Am I right in assuming that we cannot consider the value of A to be 5 because the question has not stated whether or not A is an integer. It could be 4.8, 5 or 5.3, too, right?

I got the correct answer as 'C' for this question, but the question I presented above is something I am curious about.

Kudos [?]: 11 [0], given: 41

Study Buddy Forum Moderator
Joined: 04 Sep 2016
Posts: 463

Kudos [?]: 107 [0], given: 272

Location: India
WE: Engineering (Other)
If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10 [#permalink]

### Show Tags

24 Nov 2017, 15:57
Quote:
If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10n, then what is the value of T?

1) $$\sqrt{A*10^m}=23100$$

2) $$n-m=7$$

Bunuel VeritasPrepKarishma niks18

Is below approach correct:

Clearly St 1 and St 2 are insufficient , combining both statements:

$$\sqrt{A*10^m}=23100$$

On squaring both sides we get

$$A*10^m = (23,100)^2$$

Substituting value of A from Q stem, since we want value of T:

$$(T / 10^n ) * 10^m = (23,100)^2$$

$$T * 10^(m-n) = (23,100)^2$$

Since we know (n-m) =7 from St 2, together both will give me value of T.
_________________

Press kudos if you liked this post

Kudos [?]: 107 [0], given: 272

If 4 < A < 6, n and m are positive integers with n > m, and T = A x 10   [#permalink] 24 Nov 2017, 15:57
Display posts from previous: Sort by