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

 It is currently 15 Nov 2018, 07:21

# Join Chat Room for Live Updates

### 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 November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### Free GMAT Strategy Webinar

November 17, 2018

November 17, 2018

07:00 AM PST

09:00 AM PST

Nov. 17, 7 AM PST. Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.
• ### GMATbuster's Weekly GMAT Quant Quiz # 9

November 17, 2018

November 17, 2018

09:00 AM PST

11:00 AM PST

Join the Quiz Saturday November 17th, 9 AM PST. The Quiz will last approximately 2 hours. Make sure you are on time or you will be at a disadvantage.

# How many 4-digit number can be made from 2018 with repetition?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Aug 2009
Posts: 7034
How many 4-digit number can be made from 2018 with repetition?  [#permalink]

### Show Tags

28 Dec 2017, 19:43
00:00

Difficulty:

45% (medium)

Question Stats:

63% (01:19) correct 37% (00:55) wrong based on 38 sessions

### HideShow timer Statistics

How many 4-digit number can be made from 2018 with repetition?

(A) $$4^4$$
(B) $$4^4-4$$
(C) $$4^4-4^2$$
(D) $$4^4-4^3$$
(E) $$4^3$$

Let's welcome 2018!!

_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

Moderator
Joined: 21 Jun 2014
Posts: 1051
Location: India
Concentration: General Management, Technology
GMAT 1: 540 Q45 V20
GPA: 2.49
WE: Information Technology (Computer Software)
How many 4-digit number can be made from 2018 with repetition?  [#permalink]

### Show Tags

29 Dec 2017, 01:21
chetan2u wrote:
How many 4-digit number can be made from 2018 with repetition?

(A) $$4^4$$
(B) $$4^4-4$$
(C) $$4^4-4^2$$
(D) $$4^4-4^3$$
(E) $$4^3$$

Let's welcome 2018!!

we have $$4$$ digits to choose from. But zero cannot be the first digit. Hence,

1st digit - $$3$$ possibilities

Rest of the digits - $$4$$ possibilities

$$3 * 4 * 4 * 4$$

$$3 * 4^3$$

$$(4-1) * 4^3$$

$$4^4 - 4^3$$

_________________

---------------------------------------------------------------
Target - 720-740
Project PS Butler - https://gmatclub.com/forum/project-ps-butler-practice-everyday-280904.html
http://gmatclub.com/forum/information-on-new-gmat-esr-report-beta-221111.html
http://gmatclub.com/forum/list-of-one-year-full-time-mba-programs-222103.html

How many 4-digit number can be made from 2018 with repetition? &nbs [#permalink] 29 Dec 2017, 01:21
Display posts from previous: Sort by