Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Jun 1708:30 AM PDT
-09:30 AM PDT
Join Manhattan Prep's expert as she walks through GMAT Focus reading comprehension.- Jun 18
08:30 AM PDT
-09:30 AM PDT
We will review and analyze the real MBA resumes students admitted to top business schools. Join us as we analyze the strengths and weaknesses of these applicants, and more. 
Jun 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment
Jun 2212:00 PM EDT
-01:00 PM EDT
TTP has received over 700 reviews on GMAT Club! This incredible milestone is a testament to our dedication to helping students score high on the GMAT for over a decade.
Jun 2301:00 PM EDT
-02:00 PM EDT
Have you ever wondered how to score a PERFECT 805 on the GMAT Focus Edition? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
The value of 12! is closest to:
[#permalink]
Updated on: 06 Feb 2017, 11:17
Updated on: 06 Feb 2017, 11:17
55
Bookmarks
Show timer
00:00
A
B
C
D
E
Difficulty:
75%
(hard)
Question Stats:
53% (02:09) correct
47%
(02:00)
wrong
based on 585
sessions
The value of 12! is closest to:
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6814
Given Kudos: 799
Location: Canada
The value of 12! is closest to:
[#permalink]
06 Feb 2017, 14:45
06 Feb 2017, 14:45
9
Kudos
14
Bookmarks
Expert Reply
Top Contributor
gupta87 wrote:
The value of 12! is closest to:
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
12! = 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
Let's look for groups of numbers that yield a product that's a power of 10.
NOTE: the answer choices are pretty spread apart, so we can be somewhat aggressive with this strategy.
12! = 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 (11 x 9 = 99, which is very close to 100). So...
≈ 12 x 100 x 10 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 (12 x 8 = 96, which is very close to 100). So...
≈100 x 100 x 10 x 7 x 6 x 5 x 4 x 3 x 2 x 1 (7 x 5 x 3 = 105, which is very close to 100). So...
≈100 x 100 x 10 x 100 x 6 x 4 x 2 x 1 (6 x 4 x 2 x 1 = 48, which is close to 50). So...
≈100 x 100 x 10 x 100 x 50
≈10² x 10² x 10 x 10² x 5 x 10
≈ 5 x 10^8
Answer: C
RELATED VIDEOS
General Discussion
The value of 12! is closest to:
[#permalink]
31 Aug 2019, 14:07
31 Aug 2019, 14:07
x=1*2*3*4*5*6*7*8*9*10*11*12
x=\(10^4\)*3*4*6*7*8*12
\(x=10^6*3*4*6*7\)
\(x=10^6*72*7\)
\(x≈10^6*500\)
\(x≈5*10^8\)
x=\(10^4\)*3*4*6*7*8*12
\(x=10^6*3*4*6*7\)
\(x=10^6*72*7\)
\(x≈10^6*500\)
\(x≈5*10^8\)
gupta87 wrote:
The value of 12! is closest to:
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
A. (10^6)
B. 3(10^7)
C. 5(10^8)
D. 7(10^9)
E. 9(10^11)
