Negative numbers are real numbers. The set of real numbers includes all the numbers that can be shown on a number line including both positive and negative numbers. More »

Pi is a real number, as all numbers that exist on a number line are real. Real numbers include all rational and irrational numbers; pi is defined as an irrational number. More »

A non-real, or imaginary, number is any number that, when multiplied by itself, produces a negative number. Mathematicians use the letter "i" to symbolize the square root of -1. An imaginary number is any real number mul... More »

Pi is a real number, as all numbers that exist on a number line are real. Real numbers include all rational and irrational numbers; pi is defined as an irrational number. More »

Quantum numbers are used to describe the energy and shape of an electron orbital within an atom. These numbers are represented by the letters n, l, m and s. The energy level quantum number, represented by the letter n, r... More »

A chart of prime numbers is a chart that lists numbers that are only divisible by one and itself. A prime number can be even or odd, but it must be a whole number. More »

To find the greatest common factor of two or more numbers, find the factors of each number, then circle the shared factors. Choose the greatest factor that the numbers share. More »