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.
n equals 10^4 + (2 * 10^2)
[#permalink]
Updated on: 21 Apr 2019, 11:27
Updated on: 21 Apr 2019, 11:27
1
Expert Reply
00:00
Question Stats:
89% (00:47) correct
10% (00:23) wrong based on 55 sessions
Hide Show timer Statistics
n equals \(10^4 + (2 * 10^2)\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Number of zeros in \(n\) |
Number of zeros in \(n^2\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: n equals 10^4 + (2 * 10^2)
[#permalink]
18 Apr 2019, 06:54
18 Apr 2019, 06:54
1
Carcass wrote:
n equals \(10^4 + (2 * 10^2)\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Number of zeros in \(n\) |
Number of zeros in \(n^2\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
\(n = 10^4 + (2 * 10^2)\)
\(= 10,000 + (2 * 100)\)
\(= 10,000 + 200\)
\(= 10,200\)
If \(n = 10,200\), then \(n^2 = (10,200)^2\)
= (10,200)(10,200)
Do we need to calculate this?
No.
Notice that the product (10,200)(10,200) will have 4 0's at the end
That is, (10,200)(10,200) = -------0000
Since n = 10,200, we can see that n has 3 zeros,
Since n² = -------0000, we can see that n² has AT LEAST 4 zeros,
We get:
QUANTITY A: 3
QUANTITY B: AT LEAST 4
Answer: B
Cheers,
Brent
Re: n equals 10^4 + (2 * 10^2)
[#permalink]
21 Apr 2019, 11:22
21 Apr 2019, 11:22
1
GreenlightTestPrep wrote:
Carcass wrote:
n equals \(10^4 + (2 * 10^2)\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Number of zeros in \(n\) |
Number of zeros in \(n^2\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
We get:
QUANTITY A: 3
QUANTITY B: AT LEAST 4
Answer: B
Cheers,
Brent
And yet, the 'correct' answer is D.
