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.
100
The numbers must average 33, so the answer is 32, 33 and 34.
9 and 9018 and 8127 and 7236 and 6345 and 54
The mean of any set of numbers is the sum of those numbers divided by how many numbers there are. Here, the sum is 99+97+91+89+81+76=533. When you divide 533 by 6 (the total number of numbers), you get 88.83333... repeating forever. In mixed number form, this is 88 and 5/6.
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.
The 3-digit numbers are all the counting numbers from 100 to 999.That's (the first 999 counting numbers) minus (the first 99 of them).There are 900 of them.
9801 * The sum of the first two odd numbers (1+3) is 4, or 22 * The sum of the first three odd numbers (1+3+5) is 9, or 32 * The sum of the first four odd numbers (1+3+5+7) is 16, or 42 * ...and so on So the sum of the first 99 odd numbers, using the pattern above, would be 992 or 9801.
10,11,12,13,...,99
The sum of all odd numbers 1 through 99 is 9,801.
The highest 3-digit number is 999. It's the 999th counting number.The first 99 counting numbers have fewer than 3 digits.So there are (999 - 99) = 900 positive 3-digit numbers.The first is 100, the last is 999.100 + 999 = 1,099101 + 998 = 1,099102 + 997 = 1,099...There are (900/2) = 450 pairs; each pair adds up to 1,099.The sum of all pairs is (450 x 1,099) = 494,550 .
Their sum is 99.
100
4950
n/2(n + 1) = 49½ x 100 = 4950
You're describing all of the counting numbers from 100 to 999.That's all of the counting numbers up to 999, except for the first 99.So there are 900 of them.
99 - 9 = 90