The golden ratio in mathematics is the irrational number (1 + sqrt 5)/2. A decimal approximation of the number is 1.618. The German astronomer Johannes Kepler and his contemporaries were the first to call it the golden r... More » Math Numbers

Martin Ohm is considered to be the golden ratio inventor, according to MathWorld, as he first used the term "golden section" in 1835. The golden ratio is a value such that x / 1 = 1 / (1 - x). More » History Inventions

The golden ratio is often used to provide pleasing composition in art, architecture and design. The Great Pyramid of Giza, the Parthenon and many of the paintings created by Leonardo da Vinci are among the most famous ex... More » Math Geometry
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Phi is the 21st letter of the Greek alphabet and in mathematics, it is used as a symbol for the golden ratio. The golden ratio refers to a special number that is approximately equal to 1.618. It is also known as the gold... More » Math Numbers

In mathematics, a prime number is any whole number greater than one that has no positive factors other than one and itself. For example, the number 17 is prime, because its only factors are one and 17. More » Math Numbers

In mathematics, the short word form is created by writing a large number using a combination of numbers and words. For instance, the short word form of 785,000 is 785 thousand. More » Math Numbers

In mathematics, a factor of a base number is any number that can be evenly divided into the base number. Due to this definition, a factor can only be less or equal to the original base number. Although all whole numbers ... More » Math Numbers