For all positive integers m, [m]=3m when m is odd and [m]=(1/2)*m when m is even. What is [9]*[6] equivalent to?
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
A. [81]
B. [54]
C. [37]
D. [27]
E. [18]
Since @m=3m when m is odd, @9 = 3*9 = 27.For all positive integers m, @m=3m when m is odd and @m=(1/2)m when m is even. Which of the following is equivalent to @9 x @6?
A - @81
B - @59
C - @36
D - @27
E - @18
Since @m=(1/2)m when m is even, @6 = (1/2)6 = 3.
Thus, @9 * @6 = 27*3 = 81.
Notice the @ symbol in the answer choices.
The correct answer must be the EQUIVALENT of 81.
Answer choice D: @27
Since @m=3m when m is odd, @27 = 3*27 = 81.
The correct answer is D.
Answer choice A is A TRAP.
Always beware of an answer choice that seems TOO EASY or TOO OBVIOUS.
