297
The sum of 99 and 58,764,964,568 is 58,764,964,667.
The sum of 88 and 11 is 99.
The sum of 99 and 64 is 163.
Well, darling, the sum of the first 99 odd numbers is 9801. You see, you take the last odd number, which is 197, multiply it by the total number of odd numbers (which is 99), and divide by 2. Voila! Math magic at its finest.
99
The sum of all odd numbers 1 through 99 is 9,801.
100
100
4950
(15+7) +99
1 + 3 + 9 + 11 + 33 + 99 = 156