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The sum of the first nine odd numbers is 81.

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10y ago

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What is the sum of the first three odd numbers?

The first three odd numbers are 1, 3, and 5. Their sum is 1 + 3 + 5 = 9.


Sum first 99 odd numbers?

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.


What are the 9 odd numbers whose sum is 50 from 1 to 50?

To find the 9 odd numbers whose sum is 50 from 1 to 50, we can first calculate the sum of all odd numbers from 1 to 50, which is (50^2)/2 = 625. Next, we subtract the sum of the first 9 odd numbers (1+3+5+7+9+11+13+15+17 = 81) from the total sum, resulting in 625 - 81 = 544. Therefore, the 9 odd numbers whose sum is 50 from 1 to 50 are 19, 21, 23, 25, 27, 29, 31, 33, and 36.


What is the sum of the first seven odd numbers?

The first seven odd numbers are 1, 3, 5, 7, 9, 11, and 13. To find their sum, you can add them together: 1 + 3 + 5 + 7 + 9 + 11 + 13 = 49. Therefore, the sum of the first seven odd numbers is 49.


What are the first three odd numbers?

the sum of the first three numbers is 1 + 3+5= 9


What is the sum of the first 1500 consecutive odd numbers?

You can work this out by realizing that the sum of the first x odd numbers is equal to x2.Consider the following examples:The first three odd numbers: 1 + 3 + 5 = 9The first five odd numbers: 1 + 3 + 5 + 7 + 9 = 25The first ten odd numbers: 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 100In each case, the number of odds you're adding together is the square root of their sum. This means that the first 1500 consecutive odd numbers have a sum of 15002, which equals 2250000, or two and a quarter million.


What is the sum of all odd numbers between 9 and 15?

To find the sum of all odd numbers between 9 and 15, we first identify the odd numbers between these two values, which are 9, 11, 13, and 15. Next, we add these numbers together: 9 + 11 + 13 + 15 = 48. Therefore, the sum of all odd numbers between 9 and 15 is 48.


Why is the sum of 3 odd numbers odd?

6 9 11 23


What is the sum of the first 2000 consecutive odd numbers?

Answer is 4000000: The sum of the first N odd numbers is N^2. Look at 1,3,5 for example. There are 3 numbers and the sum is 9 which is 3^2. Add 7 and the sum is 16 which is 4^2. So the of the first 2000 consecutive odd numbers is 2000^2 Note 2000 is 2(10^3). When we square that it is 4x10^6=4000000


What is the sum of the first 5 positive odd numbers?

1+3+5+7+9=25


What are the 9 odd numbers which gives the sum eighty?

Not possible ! If you add an odd number of odd numbers together, the result will ALWAYS be odd !


What is sum of the first six positive odd numbers?

1 + 3 + 5 + 7 + 9 + 11 = 36