-30
How about: 30 and 30
30 and 3
86
10 and 15
The two numbers are 5 and -6. 5x(-6) = -30 so the product is -30 and 5+(-6) = -1 so the sum is -1
10 and 20.
15 and 2
10 and 3
It is not possible. The square root of 1254 is 35.41..., therefore there cannot be two numbers between 20 and 30 whose product is 1254.
3 and 30
If the two numbers do not have any factors in common (other than 1), then the LCM is the same as the product of the two numbers. Example: LCM of 5 & 6 is 30, which is the same as the product.