Posted by Kristy on .
what do we call the numbers that cannot be arranged into 2row arrays?
I think this is the 3rd time I've seen this question posed.
I'm not aware of any special name for arrays with two rows, so I'd sure be interested to see what the quesioner has in mind here.
As for the numbers that can not be arranged this way, I suppose we could call them scalars, vectors or a number of other things. There's nothing special about them either, at least nothing I'm aware of.
In what class is this question arising? I'm really interested in knowing.
THIS QUESTION WAS POSED ON A 5TH GRADE MATH HOMEWORK PAGE. I AM UNABLE TO FIND THE ANSWER ANYWHERE, BUT I FOUND YOUR SITE AND THOUGHT I'D LET YOU KNOW IT IS BEING ASKED. THANKS!
I found this on a web site for Math Homework ... Hope it helps :o)
The answer is odd #'s
Odds and Evens
The concepts of odd and even numbers are somewhat bewildering to many young children, so having a method to model numbers that clearly shows the difference between odds and evens is crucial. Even numbers can be made into tworow arrays, but odd numbers cannot  there being always one item left over. The making of two rows highlights the fact that even numbers are always divisible by two.
56789012345

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