It is true that [9] x [6] = 81.[m] = 3m for all odd m; [m] = 1/2m for all even m. solve [9] X [6]?
A) (81)
B) (54)
C) (36)
D) (27)
E) (18)
Hi Brent ,Brent@GMATPrepNow wrote:It is true that [9] x [6] = 81.[m] = 3m for all odd m; [m] = 1/2m for all even m. solve [9] X [6]?
A) (81)
B) (54)
C) (36)
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
However, the answer choices are as follows:
a) [81]
b) [54]
c) [37]
d) [27]
e) [18]
So, which of these 5 answer choices equals 81?
Since 27 is odd, [27] = (3)(27) = 81
So, the correct answer is D
Cheers,
Brent
One nice way to stay out of trouble here is to transform all the answers. Since [81] isn't just 81, start by writing it as 243. (If you have a piece of paper, write each transformed answer choice down.)anant03 wrote:
Thanks for the explanation , but the question is simply asking which of the following is equivalent to [9]X[6] and also how do we get to know that we have to do more after getting 81 as answer?
Please explain
