It is currently 21 Mar 2018, 04:06

### 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 unit digit of

Author Message
TAGS:

### Hide Tags

SVP
Joined: 26 Mar 2013
Posts: 1517
What is the unit digit of [#permalink]

### Show Tags

16 Oct 2017, 14:09
1
This post was
BOOKMARKED
00:00

Difficulty:

15% (low)

Question Stats:

79% (00:56) correct 21% (00:50) wrong based on 39 sessions

### HideShow timer Statistics

What is the unit digit of $$\frac{(5! 4!+6! 5!)}{3!}$$ ?

1) 4
2) 3
3) 2
4) 1
5) 0
[Reveal] Spoiler: OA
VP
Joined: 22 May 2016
Posts: 1427
What is the unit digit of [#permalink]

### Show Tags

16 Oct 2017, 15:54
Mo2men wrote:
What is the unit digit of $$\frac{(5! 4!+6! 5!)}{3!}$$ ?

1) 4
2) 3
3) 2
4) 1
5) 0

Every factorial greater than 4! has a units' digit of 0.

So (units' digits ONLY)

$$\frac{(0)(4) + (0)(0)}{6} =\frac{0}{6} = 0$$

_________________

At the still point, there the dance is. -- T.S. Eliot
Formerly genxer123

Intern
Joined: 28 Dec 2010
Posts: 49
Re: What is the unit digit of [#permalink]

### Show Tags

16 Oct 2017, 23:01
3! is 6.
Your first doubt would be whether numerator is divisible by 6 or not.

5! would give you a 0 in unit digit and is divisible by 6
So 0 + 0, would give you 0.
_________________

_________________________________________

Re: What is the unit digit of   [#permalink] 16 Oct 2017, 23:01
Display posts from previous: Sort by

# What is the unit digit of

 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®.