GMAT Quantitative Reasoning focuses on mathematical concepts and problem-solving skills essential for success on the GMAT exam.
Often, you may not know the answer immediately, and that’s okay! Use elimination to rule out obviously wrong choices and estimation to get close to the right answer.
These techniques increase your odds of a correct answer, even when unsure.
Eliminating two options, then estimating between the last two.
Plugging answer choices into the question to see which works.