1290
They can be: 2*27 = 54
13*31=403 13 and 31 are prime numbers.
Multiply together two or more prime numbers.
They are: 1 times 137 = 137 which is a prime number
1290
5 and -3
6x7
9
i have no idea what it is but i think its something you multiply by itself and you will get the answer.
When you multiply two numbers, you get the product
199
-1
240 and 1
21 and 5
38 and 8
The numbers are: -5 and 3