90 + 3 + 6
99 and -99
4950
297
The three prime numbers that add up to 99 are 3, 5, and 91. However, 91 is not a prime number, so a combination of prime numbers that sums to 99 doesn't exist. The only way to express 99 as a sum of prime numbers would involve at least one composite number.
93, 2, 1 are three numbers that add up to 96
Do you mean:"What three consecutive numbers add up to 99?" If you do, then the numbers are 32, 33, 34.
99 and -99
4950
99
99
99
297
-99
93, 2, 1 are three numbers that add up to 96
There is no such set of numbers.
-99
97, 98, 99 and 100.