Posted by dequan on .
What do we call the numbers that cannot be arranged into 2row arrays?

Dutch Fork Elementary 
SraJMcGin,
Thank you for using the Jiskha Homework Help Forum. There is online a Grade 5 test (several units) with the answers!
They are called odd numbers. All even numbers are divisible by 2, so can be put into 2row arrays. All odd numbers will either be missing one, or have an extra.