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 k is an odd integer, which of the following must be an ev
[#permalink]
26 Nov 2017, 09:14
26 Nov 2017, 09:14
1
Bookmarks
00:00
Question Stats:
85% (00:53) correct
14% (00:52) wrong based on 28 sessions
Hide Show timer Statistics
If k is an odd integer, which of the following must be an even integer?
A. \(k^2 – 4\)
B. \(3k + 2\)
C. \(2k + 1\)
D. \(\frac{12k}{8}\)
E. \(\frac{6k}{3}\)
Kudos for correct solution.
A. \(k^2 – 4\)
B. \(3k + 2\)
C. \(2k + 1\)
D. \(\frac{12k}{8}\)
E. \(\frac{6k}{3}\)
Kudos for correct solution.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: If k is an odd integer, which of the following must be an ev
[#permalink]
30 Nov 2017, 15:59
30 Nov 2017, 15:59
2
Bunuel wrote:
If k is an odd integer, which of the following must be an even integer?
A. k² – 4
B. 3k + 2
C. 2k + 1
D. 12k/8
E. 6k/3
Kudos for correct solution.
A. k² – 4
B. 3k + 2
C. 2k + 1
D. 12k/8
E. 6k/3
Kudos for correct solution.
The key word in must, which means the correct answer will yield an EVEN value for ALL odd values of k.
So, if we find an odd value for k that does NOT yield an even output, then we can eliminate that answer choice.
Let's see what happens when k = 1 (1 is a nice odd integer to work with)
Plug k = 1 to get...
A. 1² – 4 = -3. -3 is NOT even. ELIMINATE A
B. 3(1) + 2 = 5. 5 is NOT even. ELIMINATE B
C. 2(1) + 1 = 3. 3 is NOT even. ELIMINATE C
D. 12(1)/8 = 3/2. 3/2 is NOT even. ELIMINATE D
By the process of elimination, the correct answer must be E
Cheers,
Brent
If k is an odd integer, which of the following must be an ev
[#permalink]
27 Oct 2018, 16:24
27 Oct 2018, 16:24
Expert Reply
If k is an odd integer, which of the following must be an even integer?
A. \(k^2 – 4\)
B. \(3k + 2\)
C. \(2k + 1\)
D. \(\frac{12k}{8}\)
E. \(\frac{6k}{3}\)
A. \(k^2 – 4\)
B. \(3k + 2\)
C. \(2k + 1\)
D. \(\frac{12k}{8}\)
E. \(\frac{6k}{3}\)
