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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m
[#permalink]
27 Jun 2022, 20:23
27 Jun 2022, 20:23
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Question Stats:
44% (00:43) correct
55% (01:05) wrong based on 9 sessions
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For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)m when m is even. What is [9]x[6] equivalent to?
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m
[#permalink]
28 Jun 2022, 06:27
28 Jun 2022, 06:27
2
GeminiHeat wrote:
For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)m when m is even. What is [9]x[6] equivalent to?
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
9 is odd, so [9] = (3)(9) = 27
6 is even, so [6] = 6/2 = 3
So, [9] x [6] = 27 x 3 = 81
BEFORE you select answer choice A, notice that 81 has brackets around it.
Since 81 is odd, [81] = (3)(81) = 243
So, answer choice A is NOT correct.
So, which of the 5 answer choices equals 81?
Since 27 is odd, [27] = (3)(27) = 81
So, the correct answer is D
Cheers,
Brent
gmatclubot
For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m [#permalink]
28 Jun 2022, 06:27
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