How about: 1*4*5 = 20
The numbers are: 24 and -4
20 = 2 x 2 x 5
-6 and -20
There are infinitely many sets of numbers. One such is 1*1*0.75*20
You can multiply 1 and 20, 2 and 10, 4 and 5.
20
The numbers are: -1 and -20
-96
How about: 1*4*5 = 20
45
The numbers are: 24 and -4
83
7 + 13 = 20 Note that there are no two prime numbers x and y that multiply to 20.
-115
The numbers are: 20 and -48
440