# Question Video: Understanding the Definition of an Array Mathematics

An array can be used to model equal groups of objects. Which of the following is NOT an array?

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### Video Transcript

An array can be used to model equal groups of objects. Which of the following is not an array?

We’re shown five different groups of objects. One of these groups is not an array, which means all the other groups are arrays. Which of these groups is not an array? An array is when objects are grouped together in equal rows, or columns. This is an array. This array shows three columns, and each column contains three dots. This is an array. We can group the dots in the second picture into three rows of two, so we know this picture is also an array.

This picture shows one row of four dots. It’s an array. This picture shows three rows, but the rows are not equal. The first row contains four dots, but the second row only contains three, and the third row contains four dots. If the rows are not equal, this is not an array. So, this is the model which is not an array.