I have a question for this type of DS problem. If one is

absolutely sure that statement 1 is sufficient, during a exam under time pressure, could we plug statement one's given variable into statement 2 to test out?

For example:

Statement 1) Given x=1/2

"I'm sure that it is possible to get y if we have 0 and X=1/2 on the number line. So sufficient."

Statement 2) Given y-x=2/3

"Since I'm confident that statement one is sufficient, let's try plugging in 1/2 for x."

so:

y-x=2/3

y-(1/2)=2/3 "From here I know that we can get y" Suf.

y=7/6

Is this reasoning okay?

Can we do this

_________________

If my post has contributed to your learning or teaching in any way, feel free to hit the kudos button ^_^