Download WordHacker Free. This vocabulary software covers high-frequency SAT and GRE vocabulary words with engaging backgrounds and constant interactive learning situations. Download Vocabulary Software Here. Downloads for GRE. GRE Practice Book. This practice book contains one full-length paper-based GRE General Test test-taking strategies sample verbal and quantitative questions with explanations sample analytical writing topics, scored sample essays Download GRE Practice Book.
This software comes directly from the source,the test makers. Prime Numbers A prime number is one that is divisible only by itself and 1. In other words, a positive integer with exactly 2 positive divisors. Memorize all primes below 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59… Factorization If X can be multiplied by Y to get Z, assuming all of these are positive integers, then X and Y are considered factors of Z. The prime factorization of a number is dividing it into its constituent primes.
To find how many factors has, first find its prime factorization:. All of its factors will be of the form. The GCF of 12 and 30 is 6 — it is the biggest divisor they both share. The easiest way to find the GCF is to take the prime factorization and multiply all of the primes that appear in both numbers. If two numbers share no primes, the GCF is 1. The least common multiple of two numbers is the smallest positive integer with both numbers as a factor.
The LCM of 4 and 6 is 12 — it is the smallest number that has both 4 and 6 in its divisors. To find the LCM of any two numbers, take the prime factorization of each number, find what prime factors appear in both, and multiply one of each of the shared primes and then by all the unshared primes. The largest possible LCM for any two numbers is one multiplied by the other.
Divisibility 3 : sum of digits divisible by 3 4 : the last two digits of number are divisible by 4 5 : the last digit is either a 5 or zero 6 : even number and sum of digits is divisible by 3 8 : if the last three digits are divisible by 8 9: sum of digits is divisible by 9 Fast Fractions Absolute Values The absolute value of a number is its distance from a number line. Most percentage problems break down into identifying the part, the percent, and the whole, one of which will be unknown.
If p percent of x is y, then , so. Ratios Ratios let us compare the proportions of two quantities. If there is a ratio of boys to girls at a school, that means that for every 5 girls, there are 2 boys. So there could be 2 boys and 5 girls, 20 boys and 50 girls, boys and girls, etc. Ratios can also be x:y:z. Roots , because.
Note that even though as well, -7 is NOT considered a solution of ; only the positive number counts in this case. In this case, -7 is known as an extraneous root. However, if you were given the question , the answer would be and. Square roots of negative numbers e. Perfect squares: Numbers with integers as their square roots: 4, 9, 16, etc. These GRE books are costly to buy.
Students search for cost effective ways to download GRE study material from the websites. Many websites are providing GRE study material for free. Aim high! Specially created for you by ETS, it offers actual Quantitative Reasoning questions with complete explanations. Plus, this guide includes a review of math topics likely to appear on the Quantitative Reasoning measure. Only ETS can show you exactly what to expect on the test. So for in-depth practice and accurate test preparation for the Quantitative Reasoning measure, this guide is your best choice!
Look inside to find: Real GRE Quantitative Reasoning test questions arranged by content and question type--to help you build your test-taking skills. Plus, mixed practice sets. Answers and explanations for every question!
0コメント