Graduated summa cum laude from Virginia Tech with a major in chemical engineering (in-major GPA: 3.94) and a minor in chemistry. Completed written and oral doctoral qualifiers in chemical engineering at MIT. Extensive research experience with the US Army Countermining Division, DuPont, and MIT.
Adjunct Professor (New England College of Business). Tutoring prodigy...I love my job and fully invest myself in my clients, as I love their success even more. Extensive tutoring experience (300+ clients in the past 4 years), particularly in math (with a specialty in calculus through differential equations), physics, chemistry (general and organic), statistics (high school through upper graduate level, with a specialty in SPSS), academic and research writing, and test preparation (GRE, GMAT, MCAT, PCAT, DAT, SAT, ACT, ASVAB, SSAT, and MTEL math). I also create electronic flashcards to help my clients study, compatible with smartphones and iPads.
Not a child genius? Not a problem. My name is Corey and I’m here to guide you through an interactive course on quantitative problem solving for mastering the math section of the GRE and GMAT exams. This is vitally important for anyone planning on applying to most graduate programs. This course has GRE and GMAT math questions with fully annotated solutions. This course is also ideal for high school students preparing for the SAT, as many of the harder math questions on the SAT will seem simple after mastering these questions. Feel free to preview sample solutions so that you have an idea of what to expect in the rest of the course. Thank you for your time and I look forward to helping you maximize your math proficiency.
This lecture will cover the derivation of the formulas for permutations and combinations. Permutations represent selecting objects from a set of objects and the order of selection IS important. Combinations represent selecting objects from a set of objects and the order of selection is NOT important.
n Permutation x = n! / (n-x)!
n Choose x = n! / ( (n-x)! * x! )
The most important exponent rules are covered in this lecture. The most important rules are:
1. Add the exponents when you have two numbers with the same base multiplied together.
2. Subtract the exponents when you have two numbers with the same base divided by each other.
3. Multiply the exponents when you have an exponent raised to an exponent.
4. Negative exponents can be made positive by moving the number from the numerator to the denominator or vice versa.
5. Radicals can be changed into fractional exponents and vice versa.
This lecture covers the most important subtopics for dealing with triangles.
1. A triangle has three sides and the sum of its angles is 180 degrees.
2. The area of a triangle is 1/2 * base * height.
3. Pythagorean's Theorem for right triangles: c^2 = a^2 + b^2.
4. An exterior angle for a triangle is equal to the sum of the other two angles.
5. There are two special triangles in terms of angles:
45:45:90 triangle = x : x : x*sqrt(2)6. Any side of a triangle must be less than the sum of the other two sides of the triangle and more than the absolute value of the difference between the other two sides of the triangle.
30:60:90 triangle = x : x*sqrt(3) : 2x
This lecture will cover divisibility rules.
2: The number is even; the number ends in 0, 2, 4, 6, or 8.
3: The sum of the digits of the number is divisible by 3.
4: The last two digits is divisible by 4.
5: The last digit is either 5 or 0.
6: The number is divisible by both 2 and 3.
9: The sum of the digits is divisible by 9.
10: The number ends in 0.
Ratios and Proportions Review Problem Video Solutions
Problem List
Topics:
Probability
Two-Way Tables
Topics:
Solving Algebraic Equations with Radicals
Topics:
Exponents
Topics: Inequalities
Systems of Equations
Topics: Translating Words Into Equations
Fraction Arithmetic
Solving an Equation for a Variable
Topics: Translating Words Into Equations
Fraction Arithmetic
Solving an Equation for a Variable
The visuals and the fact that I can go back to the lectures whenever and how many times I want for review after tutoring sessions is very helpful for me and good reinforcement.
Corey covers all of the math concepts that you might find on the GRE. He is skilled at breaking them down in a way that's understandable and applicable on actual GRE questions. Same with his solutions to the practice problems - he's great at picking out the underlying equations that the word problems are masking, so that you can understand the simplest (and surest) way to approach similar questions on the GRE. I would take more of his courses if they were on here!
I highly recommend using Corey's course--he breaks down the problems into details which are essential in understanding both the concept and building a strong groundwork for future similar problems. His tactics are very useful as well. With practice, I am sure that I will master solving the problems faster which is a key in getting a good GRE score. Thanks Corey!
Corey is very clear in his instruction, and speaks slowly so the problems are easier to grasp. I have purchased Coreys classes in other forums and he never disappoints.