Square

Find the square root of 360 or the cube root of 54 or the fourth root of 96.
Susan O. Johnsey www.mathinabox.com
Duration : 0:10:5

This video shows a simple and extremely fast method to square 3 digit numbers with 0 as a middle digit. Once this method is understood it should not take more than 3 seconds to square any 3 digit number with 0 as the middle digit.
Duration : 0:4:13

For a complete lesson on simplifying square roots, go to http://www.yourteacher.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn how to simplify square roots of perfect squares, as well as square roots of numbers that are not perfect squares. The terms radical and radicand are [...]

This video will teach you how to quickly square a 2-digit number. With some practice you’ll be able to square any 2-digit number in your head.
Check out http://WildAboutMath.com for more fun Math stuff!
Duration : 0:4:45

This is my unusual way of solving the 15 puzzle, including the story that inspired it.
You can learn to do this feat yourself at: http://headinside.blogspot.com/2005/06/40-30s-4-15.html
You can see even more videos of amazing mental feats at the Grey Matters Video Blog at:
http://gmvlog.blogspot.com/
Train and strain your brain to entertain!
Duration : 0:3:37

This stickman video shows how to square numbers ending in 5.
Duration : 0:4:14

This stickman video shows how to square numbers ending in 5.
Duration : 0:4:14

For a complete lesson on dividing square roots, go to http://www.yourteacher.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to divide square roots by dividing the numbers that are inside the radicals. Students also learn that if there is a square root in the denominator [...]

Learn how irrational numbers were found.
Duration : 0:8:31

The product of 2 consecutive even numbers is 12 more than the square of the smaller number. Find the numbers?
Let the first consecutive number be x. It then follows that the second consecutive number must be x + 2.
"The product of 2 consecutive even numbers …."
(product means multiply)
x(x + 2)
"is"
=
"12 more"
+ [...]