25 and 49.
81 + 16
2000 2000
big cheese
16 -9
They can be: 144-64 = 80
They are: 100-16 = 84
A square number will have one factor pair that consists of the same number (the square root). In the list of factors, that number will be written once.
a square number
It's a square number. Square numbers have a factor pair that is the same number twice. When listed, that number occurs once.
A square number
8464 and 3364