99
99 and -99
4950
-97
99
99
Do you mean:"What three consecutive numbers add up to 99?" If you do, then the numbers are 32, 33, 34.
90 + 3 + 6
-97
If the two numbers are relatively prime, their least common multiple is their product. The prime factors of 99 are 3, 3, and 11. Since the two numbers are relatively prime, the possibilities are 9 and 11 or 1 and 99. The pair of 9 and 11 add up to 20 and their least common multiple is 99. So, 9 and 11 are the two numbers.
-99
97, 98, 99 and 100.