20
They are: (-40+square root of 1500) and (-40-square root of 1500)
81 and 9 if you add them. 4 and 25 if you multiply them.
115
Product = multiply.
341
There are no two consecutive numbers that add or multiply to 102.
-115
If you've written that correctly, there aren't two whole numbers that satisfy those conditions. -20 and -5 add to -25, but multiply to 100. -25 and 4 multiply to -100, but add to -21.
50
It's unclear whether you want two numbers that add to a sum or multiply to a product. 25 x 4 = 100 25 + 75 = 100
-100
125
99
120
81 and 9 if you add them. 4 and 25 if you multiply them.
115
-148
what 2 numbers add to make five and multiply to make -36