K theory is a way of thinking about numbers. In K theory, numbers are grouped together in a special way. Numbers that are equal, or close to each other, are called k’s. Examples of k’s are 0,1,2,3,4,5, and 6. All numbers that are not close together are not grouped together into a k.
To understand K theory better, think of the numbers like a puzzle. Each of the k’s is like a piece of the puzzle. So if you have the pieces 0,1,2,3,4,5, and 6, you can put them together to make a picture or puzzle. K theory helps us to think of numbers in different ways so that we can solve problems.