## Introduction to Common Multiple

A common multiple is a number that is a multiple of two or more numbers. For example, 6 is a common multiple of 2 and 3 because 6 is a multiple of 2 and 3.

## Grid Method

A grid method is a way of solving a two-dimensional problem by breaking it into a series of one-dimensional problems. The grid method is often used to solve problems in physics and mathematics.

To use the grid method, draw a grid on a piece of paper with the x-axis running horizontally and the y-axis running vertically. Next, identify the coordinates of the points in the problem. Then, solve each of the one-dimensional problems one at a time. Finally, use the results from the one-dimensional problems to solve the original problem.

## Vann Diagram

A Vann diagram is used to graphically display the relative proportions of different items in a set. The diagram is named for its inventor, John Vann.

The items in the set are displayed as points on a coordinate plane, with the horizontal axis representing the items and the vertical axis representing the proportions. The points are connected by lines to indicate the relationship between the items.