Take a look at this question. Again, the first thing
we’ll do is evaluate the question stem.
If a and b are positive integers and a
+ b > ab, what is the value of a?
1) 
2) ab ? a
This question is testing
rules.
1)
| |
 |
Sufficient |
 |
Insufficient |
|
|
2) ab ? a
| |
|
Sufficient |
|
Insufficient |
|
|
Countinue
This tells us that the product of a
and b does not equal a. If b equaled 1, then ab
would have to equal a. So b must not equal 1. If b
doesn’t equal 1, it must be a that equals 1 in the original inequality.
Now we know the precise value of a, so we can answer the question
in the stem (what is the value of a?). So, statement (2) is sufficient
by itself.
Next to display next topic in the chapter.
Test Prep Lessons With Video Lessons and Explained MCQ