Speed Math

How to Compute Cubed Roots Fast

Take a look at this video of Scott Flansburg on the Discovery Channel’s “More Than Human”: In the video you see Scott Flansburg take the cubed root of 658,503 to get an answer of 87 in a matter of a second. How does he do it you ask? This trick does require some memorisation though, …

The Human Calculator – Scott Flansburg

Scott Flansburg was born in New York on December 28, 1963. He served in the U.S. Air Force (1982-1988) and had a tour of duty with the Office of Special Investigations in Tokyo, Japan. He then returned to the United States and became an advocate of teaching math in an innovative fashion.  In 1989 …

The Trachtenberg Speed System

Who was Trachtenberg? Professor Jakow Trachtenberg was the founder of the Mathematical Institute in Zurich, Switzerland. He was a Russian, born June 17th, 1888, and studied engineering. While still in his early twenties, he became Chief Engineer with 11,000 men under his supervision. After the Czar of Russia was overthrown, he escaped to Germany where …

Speed Math via Vedic Mathematics

Vedic mathematics is based on sixteen sutras which serve as somewhat cryptic instructions for dealing with different mathematical problems. Below is a list of the sutras, translated from Sanskrit into English. They were presented by a Hindu scholar and mathematician, Jagadguru Swami Sri Bharati Krishna Tirthaji Maharaja, during the early part of the 20th century. …

Trick for computing mod 13

0. Take any non-negative integer in base 10; for example, 4523. 1. Start at the most significant digit; in our example 4. 2. Now follow the hollow arrow once; i.e., we go to 1. 3. Now follow the solid arrows as many times as the next most significant digit; i.e., we follow the solid arrows …

Memorizing Pi – World Records and Techniques

How many digits of pi do you have memorized? But seriously… is it 3? 5? 10? more than 30? If it’s more than 30 pat yourself on the back because that’s a great accomplishment! If it’s only a few, then no worries. Below we will teach you some techniques that can be used to conquer …

Divisibility Tricks

Is the number N divisible by…. 2? 3? 5? Everyone knows the first trick: N is divisible by 2 if its last digit is 0, 2, 4, 6, or 8 (that is, the last digit is even). Most people know the next trick: N is divisible by 3 if the sum of the digits is …