What are numbers that cannot be arranged into 2-row arrays called?
odd #'s?
i need lots of help but my teacher is scary.her name is dr.stewart.
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Numbers that cannot be arranged into 2-row arrays are called prime numbers. To understand why, let's first understand what a prime number is.
A prime number is a positive integer greater than 1 that has no positive divisors other than 1 and itself. In other words, it cannot be divided evenly by any other number except 1 and itself.
Now, let's consider arranging numbers into a 2-row array. If a number can be arranged into a 2-row array, it means that it can be divided into two integers, which are the sizes of the rows. For example, the number 6 can be arranged into a 2-row array with row sizes 2 and 3 (2x3), and so can the number 4 with row sizes 1 and 4 (1x4).
However, prime numbers cannot be divided into two integers except for 1 and itself. For example, the number 5, being a prime number, cannot be arranged into a 2-row array since the only possible row sizes would be 1 and 5, which are not two different integers.
Therefore, numbers that cannot be arranged into 2-row arrays are prime numbers.