1 and 13
13 x 1
No whole numbers, if that's what you mean, except for the trivial 1 x 13. 13 is a prime number.
12 and 13
-17
13*13
1 and 13
13 x 1
13 and 3
Oh, what a happy little question! You can multiply the numbers 3 and 13 to get 39. Just like mixing colors on your palette, these numbers come together beautifully to create a perfect harmony of 39. Remember, there are many ways to reach an answer, just like there are many ways to paint a beautiful landscape.
How about: 13 times 13 = 169
-1
5*13 = 65
9*13 = 117
27
13*31=403 13 and 31 are prime numbers.
-10 and -3