GRE Prep 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.
10! + 9! can be rewritten as: A. 9!(10) B. 11!/10 C. (10!)^2*9 D. (9!
[#permalink]
12 Oct 2021, 09:58
12 Oct 2021, 09:58
Expert Reply
00:00
Question Stats:
75% (00:53) correct
25% (02:21) wrong based on 4 sessions
Hide Show timer Statistics
10! + 9! can be rewritten as:
A. 9!(10)
B. 11!/10
C. (10!)^2*9
D. (9!)^2 + 10
E. 19!
A. 9!(10)
B. 11!/10
C. (10!)^2*9
D. (9!)^2 + 10
E. 19!
Re: 10! + 9! can be rewritten as: A. 9!(10) B. 11!/10 C. (10!)^2*9 D. (9!
[#permalink]
12 Oct 2021, 11:12
12 Oct 2021, 11:12
1
Carcass wrote:
10! + 9! can be rewritten as:
A. 9!(10)
B. 11!/10
C. (10!)^2*9
D. (9!)^2 + 10
E. 19!
A. 9!(10)
B. 11!/10
C. (10!)^2*9
D. (9!)^2 + 10
E. 19!
Simplifying \(10! + 9!\) as \(10 * 9! + 9! = 9!(10+1) = 11 * 9!\)
Let's look at the choices
A. 9!(10) - Less than 11 * 9!, so incorrect
B. 11!/10 - rewrite as 11 * 10 * 9! /10= 11 * 9!, so correct
C. (10!)^2*9 = 10! is raised to power 2, so too large
D. (9!)^2 + 10 = 9! is raised to power 2, so too large
E. 19! = too big
Only B) is the answer.
gmatclubot
Re: 10! + 9! can be rewritten as: A. 9!(10) B. 11!/10 C. (10!)^2*9 D. (9! [#permalink]
12 Oct 2021, 11:12
Moderators:
