From which of the following does it follow that x must be greater than y ?
Countinue
This is a "must be" question, so we need to find the one answer choice that's true in all cases (or conversely, to eliminate the 4 answer choices that can sometimes not be true).
For instance, Choice (1) is out: 
does not guarantee that 
for example 
but 2 is not greater than 3.
Likewise, Choice (2): 
does not guarantee that 
for example 
but -3 is not greater than 2.
Choice (3) is out as well: 
does not guarantee that 
for example 
but 3 is not greater than 4.
Choice (4) is also out: 
does not guarantee that 
for example 
but -3 is not greater than -2.
So, by the process of elimination, the correct answer must be Choice (5) — which works whether you're dealing with positives, negatives, or fractions.
Next to display next topic in the chapter.
Test Prep Lessons With Video Lessons and Explained MCQ
Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.
Each exam has different types of math sections. The sections may be called Mathematics or Arithmetic Problem Solving. In the math section of the exam, you will be tested on basic math skills such as addition, subtraction, multiplication, and division. Some sections may include fractions, decimals, graphs and percentages. All questions will be a multiple choice format. The amount of math questions on each test will vary.