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GRE Math Basics: Quick Tips

Prime numbers 2 is the smallest prime number 2 is the only prime even number 1 is not a prime 3, 5, 7 are the only odd consecutive sequence of three integers   Digits In the integer 5,432, 5 is the thousands digit, 4 is the hundreds digit, 3 is the tens digit, and 2 [...]

Prime Numbers and Probability – GRE Math Problem

Oftentimes, math problems will require that you know more than one concept. Sometimes, you’ll have to know the difference between an integer and a number in order to get the question right. Below, I’ve combined prime numbers with probability, two subjects already covered in this blog. The question below isn’t easy and actually takes a [...]

Do GRE Prime Number Problems Scare You? — Have a Go at the New GRE Math Format

Below is a prime number problem. Before I launch into my prime number post, why don’t you take a minute or two to crack the problem? x^3 = n. If the units digit of n is a prime number, then indicate each of the following that could be the value of x.   [A] 1 [...]

Think You Know Your Prime Factors?

Here is a good problem to test your understanding of prime factors, not to add multiples. See if you can finish the problem in less than 2 minutes. If P is the product of all of the positive multiples of 11 less than 100, then what is the sum of the distinct primes of P? [...]