Hey guys, I am confused at this DS question...hope u can help clarify it for me.
#28 pg. 280
Is x an integer?
(1) x/2 is an integer
(2) 2x is an integer
The answer is A.
So you can plug in 6 for x, and that will satisfy statement 1. But can't you also plug in 3/2 for x? The answer will be 3, which will still satisfy statement 1. So if x can both be an integer and non-integer, A can't be the answer right?
I don't know...it's past midnight here. Maybe I'm just getting delirious...??
we always want the minimum values for the numerator in divisibility questions. the min of x/2 is 2. all numerators will be multiples of 2 so x is an integer.
You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson