What do we call the numbers that cannot be arranged into 2-row arrays?

I don't know exactly what you mean. Perhaps single-digit numbers, such as 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 -- ??

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Does anyone know the answer to my question?

we call them odd numbers as in 1, 3, 5 etc, we can use even numbers to make 2 row arrays, hope this helps and got to you in time,

hj

Actually, the numbers that cannot be arranged into 2-row arrays are called odd numbers. Odd numbers are integers that are not divisible evenly by 2. Examples of odd numbers include 1, 3, 5, 7, and so on. In contrast, even numbers can be arranged into 2-row arrays because they are divisible evenly by 2. Examples of even numbers include 0, 2, 4, 6, 8, and so on. The concept of odd and even numbers is an important part of elementary mathematics, and it can be helpful to understand this distinction when working with arrays, patterns, and calculations.