This is a DS question from PR Math Bin 1.
What is the value of x?
(1) x^2 = 4x (^ is my representation of to the power of)
(2) x is an even integer.
The choice are standard DS choices.
My answer was (C) BOTH statements together are sufficient but NEITHER statement alone is sufficient.
My solution is as follows:
x^2 = 4x
x^2 - 4x =0
x(x-4) = 0
So x=0 or x=4. So (1) alone not sufficeint.
(2) alone not sufficent.
Combining (1) and (2) we can get the value of x as 4, since zero (0) is neither even nor odd. So my answer was (C).
But the book says the answer is (E) Statements (1) and (2) TOGETHER are NOT sufficient.
All the calculations in the book were similar and it boils down to x=4 and x=0. But book says both 4 and 0 are even, so combining both is also not sufficient to determine the value of x.
As far as my knowledge goes 0 is neither even not odd. But the book says 0 is even. this was quite surprising for me. Is it GMAT Math?? or a mistake by PR guys.
Need clarification form u guys
What is the value of x?
(1) x^2 = 4x (^ is my representation of to the power of)
(2) x is an even integer.
The choice are standard DS choices.
My answer was (C) BOTH statements together are sufficient but NEITHER statement alone is sufficient.
My solution is as follows:
x^2 = 4x
x^2 - 4x =0
x(x-4) = 0
So x=0 or x=4. So (1) alone not sufficeint.
(2) alone not sufficent.
Combining (1) and (2) we can get the value of x as 4, since zero (0) is neither even nor odd. So my answer was (C).
But the book says the answer is (E) Statements (1) and (2) TOGETHER are NOT sufficient.
All the calculations in the book were similar and it boils down to x=4 and x=0. But book says both 4 and 0 are even, so combining both is also not sufficient to determine the value of x.
As far as my knowledge goes 0 is neither even not odd. But the book says 0 is even. this was quite surprising for me. Is it GMAT Math?? or a mistake by PR guys.
Need clarification form u guys
