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A rectangular arrangement of numbers in rows and columns?
It is a matrix or a determinant.
Which numbers between 3 and 11 are rectangular?
Well, honey, none of the numbers between 3 and 11 are rectangular. Rectangular numbers are the product of two consecutive integers, like 6 (2x3) or 12 (3x4). So, in this case, you're out of luck if you're looking for rectangular numbers between 3 and 11.
What does the word array mean in math?
An array is a set of numbers that form some sort of regular arrangement. A linear array is a 1-dimensional array consisting of a row or a column of a set of numbers. A 2-dimensional array is a rectangular arrangement of numbers. And there are arrays with higher dimensions. The elements of an array need not be numbers: they could be variables, functions or expressions. In other words, it's a picture to describe a multiplication problem.
Add the rectangular numbers between 11 and 17?
57
What are the rectangular numbers between 3 and 11?
4, 6, 8, 9, 19
