Have questions about your preparation or an upcoming test? Need help modifying the Study Plan to meet your unique needs? No problem. Just book a Skype meeting with Brent to discuss these and any other questions you may have.

- Video Course
- Video Course Overview
- General GMAT Strategies - 7 videos (free)
- Data Sufficiency - 16 videos (free)
- Arithmetic - 38 videos
- Powers and Roots - 36 videos
- Algebra and Equation Solving - 73 videos
- Word Problems - 48 videos
- Geometry - 42 videos
- Integer Properties - 38 videos
- Statistics - 20 videos
- Counting - 27 videos
- Probability - 23 videos
- Analytical Writing Assessment - 5 videos (free)
- Reading Comprehension - 10 videos (free)
- Critical Reasoning - 38 videos
- Sentence Correction - 70 videos
- Integrated Reasoning - 17 videos

- Study Guide
- Your Instructor
- Office Hours
- Extras
- Prices

## Comment on

Choosing a Statement## Hey Brent!

Thank you for the awesome job at clear and simplified explanations. Based on this video, As soon as we looked at statement 2, I figured x=3. Following the no contradiction rule, I plugged in 3 for the x in statement 1 and the equation zeroed out. Will that be a sufficient reason to determine insufficiency for statement 1 since x can be any value when the equation zeroes out.

## Hi abrahamic,

Hi abrahamic,

That strategy can get you in trouble.

Once you determine (from statement 2) that x = 3, then the sufficiency of statement 1 depends on whether it allows for more than one x-value.

Your question: "Will that be a sufficient reason to determine insufficiency for statement 1, since x can be any value when the equation zeroes out."

My answer: But, how many x-values will satisfy the equation?

If statement 1 were x - 3 = 0, then plugging in x = 3 (from statement 2) would find that this x-value satisfies the equation. Does this mean that statement 1 is not sufficient? No, statement 1 would definitely be sufficient.

Likewise, if statement 1 were x² - 6x + 9 = 0, then this statement would also be sufficient, since there's only one x-value (x = 3) that satisfies the equation.

## This stuffs can be slippery.

## That seems like a reasonable

That seems like a reasonable plan.

## Add a comment