BTGmoderatorDC wrote: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]
How will i solve this kind of problem?
OA D
We are given that [m] = 3m when m is odd, and [m] = (1/2)*m when m is even, and we must determine the value of [9]*[6].
Since 9 is odd, [9] = 3 x 9 = 27.
Since 6 is even, [6] = (1/2) x 6 = 3.
Thus, [9]*[6] = 27 x 3 = 81.
Now we must determine which "bracketed" answer choice is equal to 81.
Since 27 is odd, we see that [27] = 27 x 3 = 81.
Answer: D
