Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 04 May 2015, 16:16

### 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

# What is the tens digit of the positive integer r ? 1) The

Author Message
TAGS:
Manager
Joined: 26 Dec 2007
Posts: 70
Followers: 1

Kudos [?]: 15 [0], given: 0

What is the tens digit of the positive integer r ? 1) The [#permalink]  06 Jan 2008, 16:43
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the tens digit of the positive integer “r”?

1) The tens digit of (r/10) is 3
2) The hundreds digit of (10r) is 6
Director
Joined: 08 Jun 2007
Posts: 584
Followers: 2

Kudos [?]: 79 [0], given: 0

Re: DS - Number Prop's [#permalink]  06 Jan 2008, 19:02
bsjames2 wrote:
What is the tens digit of the positive integer “r”?

1) The tens digit of (r/10) is 3
2) The hundreds digit of (10r) is 6

B

1-- gives the hundreds digit.

2--- gives tenth digit.
CEO
Joined: 29 Mar 2007
Posts: 2591
Followers: 16

Kudos [?]: 234 [0], given: 0

Re: DS - Number Prop's [#permalink]  06 Jan 2008, 19:26
bsjames2 wrote:
What is the tens digit of the positive integer “r”?

1) The tens digit of (r/10) is 3
2) The hundreds digit of (10r) is 6

1: could be 300 or 330 Insuff.

2: 10* any integer just adds another 0. So essentially we know the tens digit is 6.

B
SVP
Joined: 04 May 2006
Posts: 1936
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 441 [0], given: 1

Re: DS - Number Prop's [#permalink]  06 Jan 2008, 19:28
bsjames2 wrote:
What is the tens digit of the positive integer “r”?

1) The tens digit of (r/10) is 3
2) The hundreds digit of (10r) is 6

r = abc
b=?

1. r/10 =ab.c, and the tens digit of r/10 is a =3, says nothing about b --->insufficient
2. 10r=abc0, and the hundreds digit of 10r is b =6, --> sufficient

B it is
_________________
Manager
Joined: 26 Dec 2007
Posts: 70
Followers: 1

Kudos [?]: 15 [0], given: 0

Re: DS - Number Prop's [#permalink]  07 Jan 2008, 05:29
I totally missed the role of the "10" in the question. so if it is r/10, and the tens digit is 3, then we know that the 3 just shifted one place to the right, so that's why we will know it's the hundred digit.

...and the same with 10r, the digits are shifted to the left.

Much easier than I realized..... Thanks everyone!
Re: DS - Number Prop's   [#permalink] 07 Jan 2008, 05:29
Similar topics Replies Last post
Similar
Topics:
23 What is the tens digit of the positive integer r? 19 23 Sep 2010, 11:11
What is the tens digit of the positive integer r? 1. the 2 13 Jan 2008, 07:30
What is the tens digit of the positive integer r? 1) The 2 13 Apr 2007, 20:54
What is the tens digit of the positive integer r? 3 16 Dec 2006, 13:05
What is the tens digit of the positive integer r? 1. the 7 08 Nov 2005, 21:25
Display posts from previous: Sort by