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

 It is currently 16 Jul 2018, 11:32

### 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 (243)^x(463)^y = n , where x and y are

Author Message
VP
Joined: 18 May 2008
Posts: 1181
If (243)^x(463)^y = n , where x and y are [#permalink]

### Show Tags

13 Feb 2009, 03:37
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

If$$(243)^x(463)^y = n$$, where x and y are positive integers, what is the units digit of n?

(1) $$x + y = 7$$
(2) $$x = 4$$

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Manager
Joined: 27 May 2008
Posts: 192
Re: DS: unit digit of n [#permalink]

### Show Tags

13 Feb 2009, 03:50
ritula wrote:
If$$(243)^x(463)^y = n$$, where x and y are positive integers, what is the units digit of n?

(1) $$x + y = 7$$
(2) $$x = 4$$

A

3 ^1 = 3
3 ^2 = 9
3 ^3 = 27
3 ^4 = 81

Since last digit of both the numbers is 3.
and X+Y = 7 the unit digit will always be 7. (since 7-4 = 3)

Stmt 2: the unit digit depends on value of Y

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS: unit digit of n   [#permalink] 13 Feb 2009, 03:50
Display posts from previous: Sort by

# Events & Promotions

 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®.