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.
If x and y are different prime numbers less than ten, what must be tru
[#permalink]
23 Jun 2021, 05:55
23 Jun 2021, 05:55
1
Expert Reply
00:00
Question Stats:
90% (00:43) correct
10% (00:45) wrong based on 10 sessions
Hide Show timer Statistics
If x and y are different prime numbers less than ten, what must be true about the sum of x and y?
A. the sum is even
B. the sum is odd
C. the sum is less than ten
D. the sum is greater than ten
E. the sum is less than 13
A. the sum is even
B. the sum is odd
C. the sum is less than ten
D. the sum is greater than ten
E. the sum is less than 13
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
If x and y are different prime numbers less than ten, what must be tru
[#permalink]
23 Jun 2021, 06:11
23 Jun 2021, 06:11
1
Carcass wrote:
If x and y are different prime numbers less than ten, what must be true about the sum of x and y?
A. the sum is even
B. the sum is odd
C. the sum is less than ten
D. the sum is greater than ten
E. the sum is less than 13
A. the sum is even
B. the sum is odd
C. the sum is less than ten
D. the sum is greater than ten
E. the sum is less than 13
APPROACH #1:
The prime numbers less than 10 are: 2, 3, 5 and 7
So, the greatest possible sum of x and y = 5 + 7 = 12, and all other sums are less than 12
Answer: E
APPROACH #2: Use the process of elimination to find the right answer
A. the sum is even
If x = 2 and y = 3, then the sum is odd.
ELIMINATE A.
B. the sum is odd
If x = 5 and y = 3, then the sum is even.
ELIMINATE B.
C. the sum is less than ten
If x = 5 and y = 7, then the sum is greater than 10.
ELIMINATE C.
D. the sum is greater than ten
If x = 2 and y = 3, then the sum is less than 10.
ELIMINATE D.
By the process of elimination, the correct answer is E
gmatclubot
If x and y are different prime numbers less than ten, what must be tru [#permalink]
23 Jun 2021, 06:11
Moderators:
