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.
A number line is divided by 10 evenly spaced tick marks. The length be
[#permalink]
07 Jan 2023, 04:31
07 Jan 2023, 04:31
Expert Reply
4
Bookmarks
00:00
Question Stats:
36% (01:35) correct
63% (01:50) wrong based on 22 sessions
Hide Show timer Statistics
A number line is divided by 10 evenly spaced tick marks. The length between each tick mark equals p, and p is a prime number.
Indicate all the possible lengths of the number line described above:
A. 10
B. 18
C. 22
D. 24
E. 27
F. 30
G. 36
H. 117
I. 130
Indicate all the possible lengths of the number line described above:
A. 10
B. 18
C. 22
D. 24
E. 27
F. 30
G. 36
H. 117
I. 130
Re: A number line is divided by 10 evenly spaced tick marks. The length be
[#permalink]
05 Feb 2023, 10:25
05 Feb 2023, 10:25
Expert Reply
OE
The question stem indicates that the number line described must include 10 tick marks. Thus, there must be exactly nine intervals (always one fewer interval between tick marks than tick marks themselves (see diagram below, starting at some constant c and ending in c + 9p). Therefore, the correct answer must be nine times a prime number, since p is prime and there are nine intervals. Choice (B) = 2 × 9, choice (E) = 3 × 9, and (H) = 13 × 9. Because 2, 3, and 13 are all prime numbers, those answers are correct. All other answer choices are not multiples of 9, except for (G), which is 4 × 9, and 4 is not prime.
GRE number line (6).jpg [ 26.75 KiB | Viewed 1386 times ]
The question stem indicates that the number line described must include 10 tick marks. Thus, there must be exactly nine intervals (always one fewer interval between tick marks than tick marks themselves (see diagram below, starting at some constant c and ending in c + 9p). Therefore, the correct answer must be nine times a prime number, since p is prime and there are nine intervals. Choice (B) = 2 × 9, choice (E) = 3 × 9, and (H) = 13 × 9. Because 2, 3, and 13 are all prime numbers, those answers are correct. All other answer choices are not multiples of 9, except for (G), which is 4 × 9, and 4 is not prime.
Attachment:
GRE number line (6).jpg [ 26.75 KiB | Viewed 1386 times ]
Re: A number line is divided by 10 evenly spaced tick marks. The length be
[#permalink]
12 Jul 2024, 14:12
12 Jul 2024, 14:12
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
