Not whole numbers, no.
Not possible in whole numbers
They are 12 and 15
For the product to be zero, one of the numbers must be 0. So the question is to find the maximum sum for fifteen consecutive whole numbers, INCLUDING 0. This is clearly achived by the numbers 0 to 14 (inclusive), whose sum is 105.
There are no such whole numbers. The sum of three consecutive whole numbers must be a multiple of 3; as 68 is not a multiple of 3 (68 = 3 × 22 2/3) it cannot be the sum of three whole numbers.
The numbers are 13 and 8 The product is 104
The sum or product of three odd numbers will always be odd.
They are 9 and 5
12 and 3.
6 and 4