1, 3, 9, 11, 33, 99
156
156
Try a factor tree. 99 33,3 11,3,3 3 x 3 x 11 = 99
To find the common factors of 99 and 33, we first need to find the factors of each number. The factors of 99 are 1, 3, 9, 11, 33, and 99. The factors of 33 are 1, 3, 11, and 33. The common factors are 1, 3, and 11. Adding these common factors together gives us 1 + 3 + 11 = 15. Therefore, the sum of all the common factors of 99 and 33 is 15.
99
1 + 3 + 9 + 11 + 33 + 99 = 156
49 of them.
1, 3, 9, 11, 33, 99.
1, 3, 9, 11, 33, 99
Use the formula for the sum of an arithmetic sequence. Start with 11, end with 99; the interval is 2.
The sum of all odd numbers 1 through 99 is 9,801.
All the common factors of 99 and 11 are: 1 and 11 .
All of them from 45 to 99 ... 55 integers.